a.
To write system of equation to represent situation.
a.
Answer to Problem 6.18EP
Explanation of Solution
Given information:
K made $52 by charging $10 per hour and $4 per child.
E made $67.50 by charging $15 per hour and $2.50 per child.
Calculation:
Let both babysit x hour individually
Let both babysit y child individually
Then sysem of equations
b.
To calculate how many hour and how many child did each babysit.
b.
Answer to Problem 6.18EP
Each babysit work 4 hours
Babysit 21 childs
Explanation of Solution
Given information:
K made $52 by charging $10 per hour and $4 per child.
E made $67.50 by charging $15 per hour and $2.50 per child.
Calculation:
Let both babysit x hour individually
Let both babysit y child individually
Then, according to given sysem of equations
Multiply equation (1) by 3 and equation (2) by 2
Substracting (4) from (3),
On solving,
Substituting
On solving,
On solving,
Then, x=4
Hence, each babysit work 4 hours and 21 child.
Chapter SH Solutions
Algebra 1, Homework Practice Workbook (MERRILL ALGEBRA 1)
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