Algebraic Expression Simple Substitution

3x + 8   if x = 2

• 13

• 14

• 15

• 16

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
3ab

• 10

• 12

• 15

• 36

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

• 5

• 6

• 8

• 10

Evaluate -2x  if     x = 10

• -8

• 20

• -20

Evaluate the expression for the given values. 5x - 3y + 2z

• 17

• 19

• 13

• 29

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

What is the value of 2a - 3b + 6 when a = 2 and b = -5?

Mathematical Equivalence

ON

Evaluate the expression. Let g = 3 h = 9

4g + 2h + 4

Mathematical Equivalence

ON

• -17

• -13

• 13

• -4