Select the expression that cannot be simplified. A 7x − 4 + 8
B 4x2 − 7x + 8
C 8x2 − 7x2 + 8x
D 4x + 8x + 7

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

What are the soultion(s) to the quadratic equation 40- x^2=0