Evaluating Expressions for Given Values

6a - 3d
when a = 1, d = 2

• 3

• 12

• 1

• 0

2x + 3 + x²; for x = 4

• 17

• 27

• 19

• 25

8y + 12 - 2z
for y = 4 and z = 2

• 40

• 20

• 84

• 34

Evaluate when x = 8:
2x + x - 10

• 34

• 22

• 14

• 24

Evaluate the expression when x = 3. 
2x² - 5

• 31

• 12

• 7

• 13

Evaluate the expression when x = 8:  
7(6 + 3 − x)

• 72

• 56

• 21

• 7

Evaluate when x = 2 and y = 5:
2 + (12 - 5x) ⋅ 2y

• 22

• 40

• 142

• -86

a² - b²
Evaluate if a=4 and b =2

• 4

• 20

• -4

• 12

Evaluate if a = 2 and b = 8
6 + 7b - 3a

• -100

• 100

• -56

• 56

What is the first step in solving this problem:
12 ÷ 6 (3) + 8

• multiplication

• addition

• division

• subtraction