Answer:
Step-by-step explanation:
C(x) = 15x + 75,000
y = 13 - 4x
Why?
4y +y = 13
Subtract 4x from both sides
4x+y-4x = 13 - 4x
Simplify
Y= 13 - 4x
Have a good day
C .10
x = 1
y = -3/2
Solution: (1, -3/2)
//Hope it helps.
im pretty sure the answer is 3/4
r=9
13r=117
r=117/13
