posted by rachel on .
Maria sells paintings in an art gallery. She ears $375 each week plus a commission equal to 2.5% of her sales. This week her goal is to earn at least $500. What is the minimum amount of sales she must have this week to achieve her goal?
let the sales be s
.025s + 375 ≥ 500
multiply by 40 to get whole numbers
s + 15000 ≥ 20000
s = 5000
She must sell at least $5000 worth of paintings