Expressions and Substitutions No Negatives

Evaluate 2r + 1      if   r = 3

• 6

• 5

• 7

• 8

Evaluate 4y  if       y = 3

• 7

• 12

3x + 8   if x = 2

• 13

• 14

• 15

• 16

Evaluate expression if a=3

18 ÷ 2a

• 3

• 6

• 27

• 9

Evaluate 2x + 5y - 4 when x = 11 and y = 3

Mathematical Equivalence

ON

Evaluate 8.7j – 9.8k when j = 7 and k = 4.

Mathematical Equivalence

ON

Answer explanation

Evaluate 8.7j – 9.8k when j = 7 and k = 4.

First, substitute for j and k:

8.7(7) - 9.8(4) then multiply.

60.9 - 39.2 and finally subtract

21.7

Tags

CCSS.MATH.CONTENT.7.EE.B.4.a

Evaluate the expression. Let g = 3 h = 9

4g + 2h + 4

Mathematical Equivalence

ON

6h + 30; Solve if h = 6

• 36

• 66

• 96

• 60

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a² + c²   

• 22

• 34

• 68

• 43

Find an equivalent expression to 
4(2x + 10y)

• 8(x + 10y)

• 8(x + 5y)

• 8x + 10y

• 8x + 14y