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All Textbook Solutions for PREALGEBRA
In the following exercises, simplify. 30+62In the following exercises, simplify. 722+522 2In the following exercises, simplify. (7+5)2In the following exercises, simplify. . 4+3(101)`In the following exercises, simplify. (4+3)(101)In the following exercises, evaluate the following expressions. 9x5when x=7In the following exercises, evaluate the following expressions. y3when y=5In the following exercises, evaluate the following expressions. 3a4bwhen a=10,b=1In the following exercises, evaluate the following expressions. bhwhen b=7,h=8In the following exercises, identify the terms in each expression. 12n2+3n+1In the following exercises, identify the terms in each expression. 4x3 +11x+3In the following exercises, identify the coefficient of each term. 6yIn the following exercises, identify the coefficient of each term. 13x2In the following exercises, identify the like terms. 5x2 ,3,5y2 ,3x,x,4In the following exercises, identify the like terms. 8,8r2,8r,3r,r2 ,3sIn the following exercises, simplify the following expressions by combining like terms. 15a=9aIn the following exercises, simplify the following expressions by combining like terms. 12y+3y+yIn the following exercises, simplify the following expressions by combining like terms. 4x+7x+3xIn the following exercises, simplify the following expressions by combining like terms. 6+5c+3In the following exercises, simplify the following expressions by combining like terms. 8n+2+4n+9In the following exercises, simplify the following expressions by combining like terms. 19p+5+4p1+3pIn the following exercises, simplify the following expressions by combining like terms. 7y2+2y+ 11+3y2 8In the following exercises, simplify the following expressions by combining like terms. 13x2+x+6+5x2 +9In the following exercises translate the following phrases in to algebraic expressions . the difference of xand 6In the following exercises, translate the following phrases into algebraic expressions. the sum of 10and twice aIn the following exercises, translate the following phrases into algebraic expressions. the product of 3nand 9In the following exercises, translate the following phrases into algebraic expressions. the quotient of sand 4In the following exercises, translate the following phrases into algebraic expressions. 371.5 times the sum of yand 1In the following exercises, translate the following phrases into algebraic expressions. 372.10 less than the product of 5and zIn the following exercises, translate the following phrases into algebraic expressions. Jack bought a sandwich and a coffee. The cost of the sandwich was $3 more than the cost of the coffee. Call the cost of the coffee c. Write an expression for the cost of the sandwich.In the following exercises, translate the following phrases into algebraic expressions. The number of poetry books on Brianna’s bookshelf is 5 less than twice the number of novels. Call the number of novels n. Write an expression for the number of poetry books.In the following exercises, determine whether each number is a solution to the equation. y+16=40 (a) 24 (b) 56In the following exercises, determine whether each number is a solution to the equation. d6=21 (a) 15 (b) 27In the following exercises, determine whether each number is a solution to the equation. 4n+12=36 (a) 6 (b) 12In the following exercises, determine whether each number is a solution to the equation. 20q10=70 3 4In the following exercises, determine whether each number is a solution to the equation. 15x5=10x+45 2 10In the following exercises, determine whether each number is a solution to the equation. 22p6=18p+86 (a) 4 (b) 23In the following exercise, rite the equation modeled by the envelopes and counters and then solve the equation using the Subtraction property of equality.In the following exercises, write the equation modeled by the envelopes and counters and then solve the equation using the subtraction property of equality.In the following exercises, solve each equation using the subtraction property of equality. c+8=14In the following exercises, solve each equation using the subtraction property of equality. v+8=150In the following exercises, solve each equation using the subtraction property of equality. 23=x+12In the following exercises, solve each equation using the subtraction property of equality. 376=n+265In the following exercises, solve each equation using the addition property of equality. y7=16In the following exercises, solve each equation using the addition property of equality. k42=113In the following exercises, solve each equation using the addition property of equality. 19=p15In the following exercises, solve each equation using the addition property of equality. 501=u399In the following exercises, translate each English sentence into an algebraic equation. The sum of 7 and 33 is equal to 40.In the following exercises, translate each English sentence into an algebraic equation. The difference of 15 and 3 is equal 12.In the following exercises, translate each English sentence into an algebraic equation. The product of 4 and 8 is equal to 32.In the following exercises, translate each English sentence into an algebraic equation. 394. The quotient of 63 and 9 is equal to 7.In the following exercises, translate each English sentence into an algebraic equation. Twice the difference of n and 3 gives 76.In the following exercises, translate each English sentence into an algebraic equation. The sum of five times y and 4 is 89.In the following exercises, translate each English sentence into an algebraic equation and then solve it. Eight more than x is equal to 35.In the following exercises, translate each English sentence into an algebraic equation and solve it. less than ais 11.In the following exercises, translate each English sentence into an algebraic equation and solve it. The difference of qand 18 is 57 .In the following exercises, translate each English sentence into an algebraic equation and solve it. 400. The sum of mand 125isIn the following exercises, solve each equation. h15=27In the following exercises, solve each equation. k11=34In the following exercises, solve each equation. z+52=85 k11=34In the following exercises, solve each equation. x93=114In the following exercises, solve each equation. 27=q+19In the following exercises, solve each equation. 38=p+19In the following exercises, solve each equation. 31=v25In the following exercises, solve each equation. 38=u16In the following exercises, list all the multiples less than 50 for each of the following. 3In the following exercises, list all the multiples less than 50 for each of the following. 2In the following exercises, list all the multiples less than 50 for each of the following. 8In the following exercises, list all the multiples less than 50 for each of the following. 10In the following exercises, using the divisibility tests, determine whether each number is divisible by 2, by 3, by 5, by 6, and by 10. 96In the following exercises, using the divisibility tests, determine whether each number is divisible by 2, by 3, by 5, by 6, and by 10. 250In the following exercises, using the divisibility tests, determine whether each number is divisible by 2, by 3, by 5, by 6, and by 10. 420In the following exercises, using the divisibility tests, determine whether each number is divisible by 2, by 3, by 5, by 6, and by 10. 625In the following exercises, find all the factors of each number. 30In the following exercises, find all the factors of each number. 70In the following exercises, find all the factors of each number. 180In the following exercises, find all the factors of each number. 378In the following exercises, identify each number as prime or composite. 19In the following exercises, identify each number as prime or composite. 51In the following exercises, identify each number as prime or composite. 121In the following exercises, identify each number as prime or composite. 219In the following exercises, find the prime factorization of each number. 84In the following exercises, find the prime factorization of each number. 165In the following exercises, find the prime factorization of each number. 350In the following exercises, find the prime factorization of each number. 572In the following exercises, find the least common multiple of each pair of numbers.In the following exercises, find the least common multiple of each pair of numbers. 12,20In the following exercises, find the least common multiple of each pair of numbers. 25,25In the following exercises, find the least common multiple of each pair of numbers. 18,40Describe how you have used two topics from The Language of Algebra chapter in your life outside of your math class during the past month.In the following exercises, translate from an algebraic equation to English phrases. 6.4In the following exercises, translate from an algebraic equation to English phrases. 15xIn the following exercises, translate from an algebraic equation to English phrases. 58+10In the following exercises, translate from an algebraic equation to English phrases. x+6=9In the following exercises, translate from an algebraic equation to English phrases. 311=33(a) write nnnnnnin exponential form (b) write 35in expanded form and then simplify.In the following exercises, simplify, using the order of operations. 4+35In the following exercises, simplify, using the order of operations. (8+1)4In the following exercises, simplify, using the order of operations. 1+6(31)In the following exercises, simplify, using the order of operations. (8+4)3+1In the following exercises, simplify, using the order of operations. (1+4)2In the following exercises, simplify, using the order of operations. 5[2+7(98)]In the following exercises, evaluate each expression. 8x3when x=4In the following exercises, evaluate each expression. y3when y=5In the following exercises, evaluate each expression. 6a2bwhen a=5,b=7In the following exercises, evaluate each expression. hwwhen h=12,w=3In the following exercises, evaluate each expression. 450.Simplify by combining like terms. (a) 6x+8x (b) 9m+10+m+3In the following exercises, translate each phrase into an algebraic expression. 5more than xIn the following exercises, translate each phrase into an algebraic expression. the quotient 12and yIn the following exercises, translate each phrase into an algebraic expression. three times the difference aof and bIn the following exercises, translate each phrase into an algebraic expression. Caroline has 3 fewer earrings on her left ear than on her right ear. Call the number of Earrings on her right ear, r. Write an expression for the number of earrings on her left ear.In the following exercises, solve each equation. n6=25In the following exercises, solve each equation. x+58=71less than y is 32.In the following exercises, solve each equation. 458. the sum of aand is 129is 164In the following exercises, solve each equation. list all the multiples of 4,that are less than 50,In the following exercises, solve each equation. Find all the factors of 90.In the following exercises, solve each equation. Find the prime factorization of 1080.In the following exercises, solve each equation. Find the LCM (Least Common Multiple) of 24 and 40.TRY IT:: 3.1 Plot the numbers on a number line. a. 1 b. -1 c. -4TRY IT:: 3.2 Plot the numbers on a number line. a. -4 b. 4 c. -1TRY IT:: 3 Order each of the following pairs of numbers using < or >. a. 15 7 b. -2 5 c. -3 -7 d. 5 -17TRY IT:: 3.4 Order each of the following pairs of numbers using < or >. a. 8 13 b. 3 -4 c. -5 -2 d. 9 -21TRYIT:: 3.5 Find the opposite of each number: a. 4 b. -3TRY IT:: 3.6 Find the opposite of each number: a. 8 b. -5Try IT:: 3.7 Simplify: (1)Try IT:: 3.8 Simplify: (5)TRY IT:: 3.9 Evaluate n: a. when n=4 b. when n=4TRY IT:: 3.10 Evaluate: m: a. when m=11 b. when m=11Try IT:: 3.11 Simplify: a. |12| b. |28|TRYIT:: 3.12 Simplify: a.|9| b.(b)-|37|TRYIT:: 3.13 Evaluate: a. |x|when x=17 b. |y|when y=39 c. |m|when m=22 d. |p|when p=11TRY IT:: 3.14 a. |y|when y=23 b. |y|when y=21 c. |n|when n=37 d. |q|when q=49TRY IT:: 3.15 Fill in <, >, or = for each of the following: a. |9||9| b. 2|2| c. 8|-8| d. -|-5|-5TRY IT:: 3.16 Fill in <, >, or = for each of the following: a. 7 |7| b. |11|11 c. |4||4| d. 1|1|TRY IT:: 3.17 Simplify: a. |129| b. 3|6|TRY IT:: 3.18 Simplify: a. |2716| b. 9|7|TRY IT:: 3.19 Simplify: |1+8||2+5|TRY IT:: 3.20 Simplify: |95||76|TRY IT:: 3.21 Simplify: 19|114(31)|TRY IT:: 3.22 Simplify: 9|84(75)|TRY IT:: 3.23 Translate each phrase into an expression with integers: a. the opposite of positive nine b. the opposite of sw 15 c. negative twenty d. eleven minus negative fourTRY IT:: 3.24 Translate each phrase into an expression with integers: a. the opposite of negative nineteen b. the opposite of twenty-two c. negative nine d. negative eight minus negative fiveTRY IT:: 3.25 Translate into an expression with integers: The football team had a gain of 5 yards.TRY IT:: 3.26 Translate into an expression with integers: The scuba diver was 30 feet below the surface of the water.In the following exercises, locate and label the given points on a number line. 1.a. 2 b. -2 c. -5In the following exercises, locate and label the given points on a number line. 2.a. 5 b. -5 c. -2In the following exercises, locate and label the given points on a number line. 3.a. -8 b. 8 c. -6In the following exercises, locate and label the given points on a number line. 4.a. -7 b. 7 c. -1In the following exercises, order each of the following pairs of numbers, using < or >. 5.a. 9__4 b. -3__6 c. -8__-2 d. 1__-10In the following exercises, order each of the following pairs of numbers, using < or >. 6.a. 6__2; b. -7__4; c. -9__-1; d. 9__-3In the following exercises, order each of the following pairs of numbers, using < or >. 7.a. -5__1; b. -4__-9; c. 6__10; d. 3__-8In the following exercises, order each of the following pairs of numbers, using . 8.a. -7__3; b. -10__-5; c. 2__-6; d. 8__9In the following exercises, find the opposite of each number. a. 2 b. -6In the following exercises, find the opposite of each number. a. 9 b. -4In the following exercises, find the opposite of each number. a -8 b. 1In the following exercises, find the opposite of each number. a. -2 b. 6In the following exercises, simplify. -(-4)In the following exercises, simplify. -(-8)In the following exercises, simplify. -(-15)In the following exercises, simplify. -(-11)In the following exercises, evaluate. mwhen a. m=3 b. m=3In the following exercises, evaluate. pwhen a. p=6 b. p=6In the following exercises, evaluate. cwhen a. c=12 b. c=12In the following exercises, evaluate. dwhen a. d=21 b. d=21In the following exercises, simplify each absolute value expression. a. |7| b. |25| c. |0|In the following exercises, simplify each absolute value expression. a. |5| b. |20| c. |19|In the following exercises, simplify each absolute value expression. a. |32| b. |18| c. |16|In the following exercises, simplify each absolute value expression. a. |41| b. |40| c. |22|In the following exercises, evaluate each absolute value expression. a. |x|when x=28 b. |u|when u=15In the following exercises, evaluate each absolute value expression. a. |y|when y=37 b. |z|when z=24In the following exercises, evaluate each absolute value expression. a. |p|when p=19 b. |q|when q=33In the following exercises, evaluate each absolute value expression. a. |a|when a=60 b. |b|when b=12In the following exercises, fill in <, >, or = to compare each expression. a. 6__ |6| b. |3|__ 3In the following exercises, fill in <, >, or = to compare each expression. a. 8__ |8| b. |2|__ 2In the following exercises, fill in <, >, or = to compare each expression. a. |3|__ |3| b. 4__ |4|In the following exercises, fill in <, >, or = to compare each expression. a. |5|__ |5| b. 9__ |9|In the following exercises, simplify each expression. |84|In the following exercises, simplify each expression. |96|In the following exercises, simplify each expression. 8|7|In the following exercises, simplify each expression. 5|5|In the following exercises, simplify each expression. |157||146|In the following exercises, simplify each expression. |178||134|In the following exercises, simplify each expression. 18|2(83)|wIn the following exercises, simplify each expression. 15|3(85)|In the following exercises, simplify each expression. 8(142|2|)In the following exercises, simplify each expression. 42.6(134|2|)Translate each phrase into an expression with integers. Do not simplify. a. the opposite of 8 b. the opposite of -6 c. negative three d. 4 minus negative 3Translate each phrase into an expression with integers. Do not simplify. a. the opposite of 11 b. the opposite of -4 c. negative nine d. 8 minus negative 2Translate each phrase into an expression with integers. Do not simplify. a. the opposite of 20 b. the opposite of -5 c. negative twelve d. 18 minus negative 7Translate each phrase into an expression with integers. Do not simplify. a. the opposite of 15 b. the opposite of -9 c. negative sixty d. 12 minus 5Translate each phrase into an expression with integers. Do not simplify. a temperature of 6 degrees below zeroTranslate each phrase into an expression with integers. Do not simplify. a temperature of 14 degrees below zeroTranslate each phrase into an expression with integers. Do not simplify. an elevation of 40 feet below sea levelTranslate each phrase into an expression with integers. Do not simplify. an elevation of 65 feet below sea levelTranslate each phrase into an expression with integers. Do not simplify. a football play loss of 12 yardsTranslate each phrase into an expression with integers. Do not simplify. a football play gain of 4 yardsTranslate each phrase into an expression with integers. Do not simplify. a stock gain of $3Translate each phrase into an expression with integers. Do not simplify. a stock loss of $5Translate each phrase into an expression with integers. Do not simplify. a golf score one above parTranslate each phrase into an expression with integers. Do not simplify. a golf score of 3 below parElevation The highest elevation in the United State is Mount McKinley, Alaska, at 20,320 feet above sea level. The lowest elevation is Death Valley, California, at 282 feet below sea level. Use integers to write the elevation of: a. Mount McKinley b. Death ValleyExtreme temperatures The highest recorded temperature on Earth is 58° Celsius, recorded in the Sahara Desert in 1922. The lowest recorded temperature is 90° below 0° Celsius, recorded in Antarctica in 1983. Use integers to write the: a. highest recorded temperature b. lowest recorded temperatureState budgets In June, 2011, the state of Pennsylvania estimated it would have a budget surplus of $540 million. That same month, Texas estimated it would have a budget deficit of $27 billion. Use integers to write the budget: a surplus b deficitCollege enrollments Across the United States, community college enrollment grew by 1,400,000 students from 2007 to 2010. In California, community college enrollment declined by 110,171 students from 2009 to 2010. Use integers to write the change in enrollment: a growth b declineGive an example of a negative number from your life experience.What are the three uses of the “-” sign in algebra? Explain how they differ.TRY IT :: 3.27 Model the expression. 2+4TRY IT : : 3.28 Model the expression. 2+5TRY IT :: 3.29 Model the expression. 2+(4)TRY IT :: 3.30 Model the expression. 2+(5)TRY IT :: 3.31 Model the expression, and then simplify: 2+(4)TRY IT :: 3.32 Model the expression, and then simplify: 2+(5)TRY IT :: 3.33 Model the expression, and then simplify: (2)+4TRY IT :: 3.34 Model the expression: (2)+5TRY IT :: 3.35 Model each addition. a. 3+4 b. 1+4 c. 4+(6) d. 2+(2)TRY IT :: 3.36 a. 5+1 b. 3+7 c. 2+(8) d. 3+(4)TRY IT :: 3.37 Simplify each expression: a. 15+(32) b. 19+76TRY IT :: 3.38 Simplify each expression: a. 55+9 b. 43+(17)TRY IT :: 3.39 Simplify each expression: 31+(19)TRY IT :: 3.40 Simplify each expression: 42+(28)TRY IT :: 3.41 Simplify each expression: 2+5(4+7)TRY IT :: 3.42 Simplify each expression: 4+2(3+5)TRY IT :: 3.43 Evaluate each expression for the given values: x+5when a. x=3and b. x=17TRY IT :: 3.44 Evaluate each expression for the given values: y+7when a. y=5and b. y=8TRY IT :: 3.45 When n=8, Evaluate a. n+2 b. n+2TRY IT :: 3.46 When y=9, evaluate a. y+8 b. y+8TRY IT :: 3.47 Evaluate the expression: a+2bwhen a=19and b=14.TRY IT :: 3.48 Evaluate the expression: 5p+qwhen p=4and q=7.TRY IT :: 3.49 Evaluate: (x+y)2when x=15and y=29.TRY IT :: 3.50 Evaluate: (x+y)3when x=8and y=10.TRY IT :: 3.51 Translate and simplify the expression: the sum of -7 and 4TRY IT :: 3.52 Translate and simplify the expression: the sum of -8 and -6TRY IT :: 3.53 Translate and simplify: the sum of 9 and -16, increased by 4.TRY IT :: 3.54 Translate and simplify: the sum of -8 and -12, increased by 7.TRY IT :: 3.55 The temperature in Chicago at 5 A.M. was 10 degrees below zero Celsius. Six hours later, it had warmed up 14 degrees Celsius. What is the temperature at 11 A.M.?TRY IT :: 3.56 A scuba diver was swimming 16 feet below the surface and then dove down another 17 feet. What is her new depth?TRY IT :: 3.57 The Bears took possession of the football on their 20-yard line. In the next three plays, they lost 9 yards, gained 7 yards, then lost 4 yards. On what yard line was the ball at the end of those three plays?TRY IT:: 3.58 The Chargers began with the football on their 25-yard line. They gained 5 yards, lost 8 yards and then gained 15 yards on the next three plays. Where was the ball at the end of these plays?In the following exercises, model the expression to simplify. 7+4In the following exercises, model the expression to simplify. 8+5In the following exercises, model the expression to simplify. 6+(3)In the following exercises, model the expression to simplify. 5+(5)In the following exercises, model the expression to simplify. 7+5In the following exercises, model the expression to simplify. 9+6In the following exercises, model the expression to simplify. 8+(7)In the following exercises, model the expression to simplify. 9+(4)In the following exercises, simplify each expression. 21+(59)In the following exercises, simplify each expression. 35+(47)yIn the following exercises, simplify each expression. 48+(16)In the following exercises, simplify each expression. 34+(19)In the following exercises, simplify each expression. 200+65In the following exercises, simplify each expression. 150+45In the following exercises, simplify each expression. 77.sw 2+(8)+6In the following exercises, simplify each expression. 4+(9)+7In the following exercises, simplify each expression. 14+(12)+4In the following exercises, simplify each expression. 17+(18)+6In the following exercises, simplify each expression. 135+(110)+83In the following exercises, simplify each expression. 140+(75)+67In the following exercises, simplify each expression. 32+24+(6)+10In the following exercises, simplify each expression. 38+27+(8)+12In the following exercises, simplify each expression. 85. 19+2(3+8)In the following exercises, simplify each expression. 24+3(5+9)In the following exercises, evaluate each expression. x+8when a. x=26 b. x=95In the following exercises, evaluate each expression. y+9when a. y=29 b. y=84In the following exercises, evaluate each expression. y+(14)when a. y=33 b. y=30In the following exercises, evaluate each expression. x+(21)when a. x=27 b. x=44In the following exercises, evaluate each expression. When a=7, evaluate: a. a+3 b. a+3In the following exercises, evaluate each expression. When b=11, evaluate: a. b+6 b. b+6In the following exercises, evaluate each expression. When c=9, evaluate: a. c+(4) b. c+(4)In the following exercises, evaluate each expression. When d=8, evaluate: a. d+(9) b. d+(9)In the following exercises, evaluate each expression. m+nwhen, m=15, n=7In the following exercises, evaluate each expression. p+qwhen, p=9, q=17In the following exercises, evaluate each expression. r3swhen, r=16, s=2In the following exercises, evaluate each expression. 2t+uwhen, t=6, u=5In the following exercises, evaluate each expression. (a+b)2when, a=7, b=15In the following exercises, evaluate each expression. (c+d)2when, c=5, d=14In the following exercises, evaluate each expression. (x+y)2when, x=3, y=14In the following exercises, evaluate each expression. (y+z)2when, y=3, z=15In the following exercises, translate each phrase into an algebraic expression and then simplify. The sum of -14 and 5In the following exercises, translate each phrase into an algebraic expression and then simplify. The sum of -22 and 9In the following exercises, translate each phrase into an algebraic expression and then simplify. 8 more than -2In the following exercises, translate each phrase into an algebraic expression and then simplify 5 more than -1In the following exercises, translate each phrase into an algebraic expression and then simplify. -10 added to -15In the following exercises, translate each phrase into an algebraic expression and then simplify. -6 added to -20In the following exercises, translate each phrase into an algebraic expression and then simplify. 6 more than the sum of -1 and -12In the following exercises, translate each phrase into an algebraic expression and then simplify. 3 more than the sum of -2 and -8In the following exercises, translate each phrase into an algebraic expression and then simplify. the sum of 10 and -19, increased by 4In the following exercises, translate each phrase into an algebraic expression and then simplify. the sum of 12 and -15, increased by 1In the following exercises, solve. Temperature The temperature in St. Paul, Minnesota was -19°F at sunrise. By noon the temperature had risen 26°F. What was the temperature at noon?In the following exercises, solve. Temperature The temperature in Chicago was -15°F at 6 am. By afternoon the temperature had risen 28°F. What was the afternoon temperature?In the following exercises, solve. Credit Cards Lupe owes $73 on her credit card. Then she charges $45 more. What is the new balance?In the following exercises, solve. Credit Cards Frank owes $212 on his credit card. Then he charges $105 more. What is the new balance?In the following exercises, solve. Weight Loss Angie lost 3 pounds the first week of her diet. Over the next three weeks, she lost 2 pounds, gained 1 pound, and then lost 4 pounds. What was the change in her weight over the four weeks?In the following exercises, solve. Weight Loss April lost 5 pounds the first week of her diet. Over the next three weeks, she lost 3 pounds, gained 2 pounds, and then lost 1 pound. What was the change in her weight over the four weeks?In the following exercises, solve. Football The Rams took possession of the football on their own 35-yard line. In the next three plays, they lost 12 yards, gained 8 yards, then lost 6 yards. On what yard line was the ball at the end of those three plays?In the following exercises, solve. Football The Cowboys began with the ball on their own 20-yard line. They gained 15 yards, lost 3 yards and then gained 6 yards on the next three plays. Where was the ball at the end of these plays?In the following exercises, solve. Calories Lisbeth walked from her house to get a frozen yogurt, and then she walked home. By walking for a total of 20 minutes, she burned 90 calories. The frozen yogurt she ate was 110 calories. What was her total calorie gain or loss?In the following exercises, solve. Calories Ozzie rode his bike for 30 minutes, burning 168 calories. Then he had a 140-calorie iced blended mocha. Represent the change in calories as an integer.In the following exercises, solve. Stock Market The week of September 15, 2008, was one of the most volatile weeks ever for the U.S. stock market. The change in the Dow Jones Industrial Average each day was: Monday -504 Tuesday +142 Wednesday -449 Thursday +410 Friday +369 What was the overall change for the week?