I believe it is -4xy + 9y^2 - 10
Answer:
A. 60a + 50 = 170
B. (75 - 10)a + 35 = 210
C. Part B had to pay a rental fee of $10 per appointment
Hope this helps:)
Brainly Plz
Answer:
1) (4,4) 2) (4,0) 3) (6,1)
Step-by-step explanation:


multiply 1 by 2=2 then write
multiply 2 by 2= 4 then write
Step-by-step explanation:
Substitute the y in the 1st equation with the 2nd equation.
7x + 10(2x + 9) = 36
7x + 20x + 90 = 36
27x + 90 = 36
3x + 10 = 4
3x = -6
x = -2
So now we can find y.
y = 2x + 9 = 2(-2) + 9 = (-4) + 9 = 5.
So x = -2, y = 5.