Answer:
He needs 80 cups.
Step-by-step explanation:
$12/$.15(profit from every cup) =80
x= 1
QS = 10 cm
QRS = 40cm
4x + 1 = 5x
x= 1 cm
QS = 4x + 1 + 5x
= 9x + 1
= 9 + 1
= 10cm
QRS perimeter
QS + RQ + RS but ( RQ = RS)
= 10 + 15 + 15
= 40cm
hope it helps u
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