Answer:
its A. B. C. D. E.
Step-by-step explanation:
all of it are correct
9x - 5y = k Substitute in the x- and y-values (x = 9 and y = 8)
9 (9) - 5(8) = k Multiply
81 - 40 = k Subtract
39 = k
When k = 39, (9, 8) will be a solution to the equation.
I believe your answer is c
$12.50
Set up a ratio.
If it was 12% off, you paid 88%.
So 88/100=11/x
Cross multiply and solve for x.
So x=1100/88=12.50