Simplify and then evaluate the equation
when a = 3.
4a2 + 6a- 3(a + 4) + 15 = [?]

4*3*2 + 6*3- 3(3 + 4) + 15

Lets use P.E.M.D.A.S

P = Parenthesis (Left to right)

4*3*2 + 6*3- 3*7 + 15

E = Exponents (We have none)

4*3*2 + 6*3- 3*7 + 15

M = Multiply (left to right)

24+18-21+15

D =  Divide (No Division)

24+18-21+15

Last, we Add and Subtract Left to Right (P.E.M.D.A.S)

= 36

10 miles

step-by-step explanation:

answer: 2x + 2 − 2 = 10 − 2; subtraction property of equality

step-by-step explanation: