unit 4

If a = 4 find:

2a + 3

• 27

• 9

• 11

• 14

If a = 2 and b = 4 find:

2a + 3b

• 7

• 56

• 16

• 11

If a = -2 , b = 4 and c = 3 find:

2a + 3b - c

• 11

• 13

• 5

• 10

If a = 6 , b = -1 and c = 2 find:

2(a + 3) - b + 2c

• 19

• 23

• 22

• 18

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

• 40
• 20
• 84
• 34

Evaluate when a = 15:
2(a - 5) + 2

• 22
• 27
• 14
• 7

Evaluate 4x + 3 if x = 2

• 45

• 20

• 5

• 11

Evaluate 3a² - ab when a = -1 and b = 3.

• 12

• -5

• 6

• 0

Let t = 3 and u = -5. Evaluate 3t - u².

• -19

• 31

• 34

• -16

Evaluate (3x - 4)(x + 8) when x = 2.

• -20

• 100

• 20

• 12