I need help Write an expression in simplest form that represents the total amount in each situation?

You bought 5 binders that each cost b dollars, a calculator for $45, and a set of pencils for $30.

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

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 is 32+4 x (16 x 1/2) -2 show your work}