Evaluate Expressions with Substitution

replacing a variable with a number or expression

• equivalent fractions

• substitution

• evaluate

• equivalent expressions

• similar figures

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

• 22

• 34

• 68

• 43

Three times a number increased by nine

• 3h-9

• 3(h-9)

• 3(h+9)

• 3h+9

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

• 10

• 12

• 15

• 36

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

• 17

• 19

• 13

• 29

50 - n ÷ 2 = ?
n = 30

• 35

• 20

• 25

• 30

Solve 4x + 3 when x = 6

• 13

• 12

• 25

• 27

Tags

TEKS 7.10A

• -17

• -13

• 13

• -4

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