Question

Chloe swam “n” number of laps to raise money for her school.

Friend A donated $20.00 plus $1.25 for every lap Chloe swam.
Friend B donated $15.00 plus $2.50 for every lap Chloe swam.
Friend C donated $40.00 plus $1.50 for every lap Chloe swam.
Friend D donated $25.00 plus $1.75 for every lap Chloe swam.


Write a variable expression to represent how much the four friends donated altogether. Let, n, represent the number of laps Chloe swam.

Answer 1

Variable expression = 7n + 100

Explanation:

Let,

n be the number of laps Chloe swam.

Friend A = Donation + Amount per lap * Number of laps

Friend A = 1.25n + 20.00

Friend B = 2.50n + 15.00

Friend C = 1.50n + 40.00

Friend D = 1.75n + 25.00

Total amount = Friend A + Friend B + Friend C + Friend D

Total amount = 1.25n+20.00+2.50n+15.00+1.50n+40.00+1.75n+25.00

Total amount = 7n + 100