Substituting Values into Formulas

Substitute x= 3 into the expression 3x+1

• 3

• 9

• 10

• 7

• 5

• 25

•  10

• 20

• 22

• 36

• 15

• 21

If a = 6 and b = 7,find the value of 15-a-b.

• 2

• 3

• 4

• 5

You are given the equation
2x + 3y = 6
Substitute the values (3, 0) into the equation. Which equation below shows a correct substitution?

• 2(0) + 3(3) = 6

• 2(3) + 3(0) = 6

• 3x + 0y = 6

• 2(3x) + 3(0y) = 6

If f(x) = 2x+1, what would the function look like once you substitute in a 1 to find f(1)?

• f(x) = 21+1

• f(1) = 2 (1) + 1

• f(1) = 2x (1) + 1

Evaluate f(-2) if f(x) = x²+ 3.

• -1

• 1

• 7

• -7

6q +m - m when m =8 and q= 3

• 63

• 24

• 18

• 1

What is the value of the expression, 9x² - 12x + 4, when x = 3?

• 22 

• 49

• 85

• 345

If x = 1, y = 3, and z = 2, what is the value of the expression 4xy + 3xz+ 7y?

• 46 

• 42

• 39

• 23