Evaluating an Algebraic Expression

Evaluate expression: -5a -b for a= -6 and b= 3

• 33

• 30

• 27

• 24

Evaluate 2x + 5(y - 1) when x = 8 and y = 5

• 20

• 31

• 36

• -4

Evaluate:
x - y - x² + (y² + x)
when x = -3 and y = -2

• -9

• 9

• -3

• -13

Simplify:
17m - 4 - 15m + 8

• 2m + 4

• 2m + (-12)

• 2m + 12

• 2m + (-4)

What are the coefficients in the expression
8a + b + 9?

• 8 only

• 1 and 8

• 8 and 9

• 1, 8, and 9

What is an algebraic expression?

• a letter or a symbol used to represent an unknown value

• an expression that contains numbers, operations, and one or more variables

• a specific number whose values does not change

Evaluate the expression when a = -15:

|a - 5| + 2

• 22

• 27

• -18

• 7

Evaluate the expression when p = 9 and q = 2:

|10p - 7q|

• 31

• 76

• -76

• 152

Which of the following expressions contains a variable?

• 7+3

• 144÷12

• 7 + 15n

• 6(5)

Simplify:
-5 - 15n - 10n + 19

• -25n + 14

• -25n + 4

• -5n + 14

• -5n + 24