Question 509606
rental is for 'x' hrs
price is 'y'
.
y = 3.5(x-1) + 8
.
y = 3.5x -3.5 + 8
.
y = 3.5x + 4.5
.
He spent 18.50
.
18.50 = 3.5x + 4.5
3.5x = 18.50 -4.5
x = 14/3.5
x = 4
.
check using the facts
hr 1 = 8
hr 2, 3 & 4 = 3.50
3*3.50 = 10.5
8 + 10.5 = 18.5
.
Answer: He rented it for 4 hr.