Exactly 20 years ago, the mean age of a group of boys was 15.7 years and the sum of the squares of their ages was 16000. If the sum of the squares of their ages has increased by 8224 in this 20-year period, find the number of boys in the group.

Q: The average amount of money held by each child in a group of 5 is $0.50.If one of the children loses…

A: Given that: Total number of child = 5Average money held by each child = $0.50

Q: Tacoma's population in 2000 was about 200 thousand, and has been growing by about 8% each year. If…

A: It is given that , Tacoma's population in 2000 was about 200,000 & has been growing by about 8 %…

Q: In the year 2015 Smallsville had a population of 37,000.  Over the next 5 years, the town grew by…

A:

Q: Tacoma's population in 2000 was about 200 thousand, and has been growing by about 8% each year. If…

A:

Q: The number of registered vehicles on the road in the United States is constantly increasing. In…

A: Given ,in 2013 number of registered vehicles were approximately 256 million Also given, This…

Q: You have 1/5 of a pizza left over from your pool party. If you sent 1/2 of the leftover pizza home…

A:

Q: A recent survey showed that 23.8 million adults have cut the cord on cable TV services, a 20%…

A:

Q: ic has a total of x pencils. If he uses 2/4 of his pencils to color his drawings and 12/24 of his…

A: Dic has a total of x pencils. He uses 24 of his pencils to color his drawings and 1224 of his…

Q: If an earthquake measures 5.3 on the Richter Scale, what is the intensity of this earthquake,…

A: Answer :- Given R=5.3  We have to find I=?

Q: Tacoma's population in 2000 was about 200 thousand, and has been growing by 8% each year. If this…

A: Given : Population at the beginning of 2000 was 200,000. There is a compounding effect in the growth…

Q: The number of infected people in a population grows by 8% per day and those who become infected…

A: Solution-: Given: Infected people grow per day r=0.08 (8%) Initially infected people=a=8 , x=45 We…

Q: a recent jacksonville daily news headline stated that "lyme disease cases quadruple in nc" this…

A: When a quantity 'quadruples', it means that it has increased by a factor of 4. In other words, the…

Q: The sum of the squares of five and a number

A:

Q: The average American house cost $243,000 in 2010 and the cost in 2019 is $315,000 What is the…

A:

Q: An endangered species has a population of 1,000,000 alive right now. This is only 0.3% of its peak…

A:

Q: Tom and Henry had the same number of marbles. Tom gave away 1/2 of his marbles. Henry gave away 3/4…

A:

Q: If I have a 89.71% in my class and a quiz is worth 5% of my grade, how much will my grade drop if I…

A: Given: The percentage obtained in class=89.71% Total grade for quiz=5% The grade obtained in quiz=0

Q: Josh live 1 4/5 miles from the park. So far he walked 2/3 of the distance from his house to the…

A: Here we have to find out the how many distance josh walk

Percentage

A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.

Algebraic Expressions

In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.

Numbers

Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.

Subtraction

Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.

Addition

Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.