Given that R = 8 x + 4 y Find y when x = 8 and R = 30 Give your answer as an improper fraction in its simplest form.

y = - 17/2

Step-by-step explanation:

Substitute with the givens.

30 = 8 (8) + 4y.

Multiply parentheses.

30 = 64 + 4y

Subtract.

30-64 = - 34

-34 = 4y.

Divide each side by 4.

y = - 8.5, or - 17/2

hope that is right!