Which expression is equivalent to 9x5 + 3x 3x(4x4 – 3x2)
?
A.48x9 – 24X6 +9x5 +9x4
B.48X9 +9X5-9x4
C.48x +36x5
D.48X9 - 72x7 +36x5

i think the answer is B or D

5/12, or 5: 12

step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.