Evaluate Algebraic Expressions with Substitution

replacing a variable with a number or expression

• equivalent fractions

• substitution

• evaluate

• equivalent expressions

• similar figures

math phrase that combines numbers AND variables (letters: 3b or 5x) by using (+, -, *, ÷). *does not have an equal sign (=)

• algebraic expression

• equivalent expressions

• reduce

• substitution

• ratio

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

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

• 17

• 19

• 13

• 29

the sum of fifty-two and a number

• n-52

• 52 + n

• 52/n

• 52n

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 3x + 2y when x = 4 and y = 5.

• 19

• 23

• 30

• 22