Algebraic Expressions Evaluating

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

• 8 only

• 1 and 8

• 8 and 9

• 1, 8, and 9

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:
17m - 4 - 15m + 8

• 2m + 4

• 2m + (-12)

• 2m + 12

• 2m + (-4)

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

• -25n + 14

• -25n + 4

• -5n + 14

• -5n + 24

Translate the phrase into an algebraic expression: Three times the difference of a number and 1

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 2r + 1 if r = -3

• -5

• 5

• 7

• -7

Evaluate the expression for the given value of the variable.
3x + 5 when x = 5

• 18

• 20

• 200

• 15