C = $7s
independent variable ie the changing variable is s
dependent variable ie the non changing variable is c
Y= 3x - 10
<span>3x + 2y = 16
3x+2(3x-10)=16
3x+6x-20=16
9x-20=16
9x=36
x=4
y=3x-10
y=3(4)-10
y=12-10
y=2</span>
Answer:
D
Work:
94-15=79ft
Therefore, the answer would be 79ft.
Hope this helps,
Trey