Solve Expressions with Substitution

If a = 4 and b = 6, what is the value of 3a + 5b?

• 40

• 42

• 44

• 46

Last one,  5x + 2x + 2= ___________
x= 2

• 16

• 13

• 0

• 4

Find the value of this expression if x = 8
x² + 12 - 2x 

• 66

• 60

• 56

• 12

r + b

if r=3 and b=5

• 35

• 15

• 8

• None of the above

Simplify: 15w - 3n + 4m

when w = 2, n = (-7), m = 3

• -63

• 63

• 21

• The answer is not here.

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

• 3

• 12

• 1

• 0

6x² + 9x + 3; solve if x = 5

• 198

• 163

• 90

• 78

Find the value of this expression if c = 4
14 + 3c² - 15 + c

• 37

• 51

• 41

• 121

Evaluate 8a - b if a = 10 and b = 6

• 74

• 38

• 86

• 8106

Work out the value of the expression when x = 3, y = – 2 and z = – 4.

• -3

• 4

• 3

• -4