Using the rule y = 3x + 4, find the value of y when x is 2.

A) 9

B) 10

C) 11

D) 12

Using the rule y = 8x + 5, find the value of y when x is 6.

A) 19

B) 43

C) 50

D) 53

If y = 3x + 5, what is the value of y when x = 12?

A) 17

B) 20

C) 31

D) 41

Use substitution to determine whether the value for x is a solution for the equation.

3x + 10 = 25

x = 5

5x - 10 = 25

x = 6

6x - 18 = 6

x = 4

4x + 12 = 40

x = 7

8x + 12 = 28

x = 3

option B

option D

option D

Correct

incorrect

correct

correct

incorrect

Step-by-step explanation:

1) y = 3x + 4 with x = 2

y = 3 (2) + 4 = 10 option B

2) y = 8x + 5 with x = 6

y = 8 (6) + 5 = 53 option D

3) y = 3x + 5 with x = 12

y = 3 (12) + 5 = 41 option D

Use substitution to determine whether the value for x is a solution for the equation

3x + 10 = 25 With x = 5

3 (5) + 10 = 25 it is correct

5x - 10 = 25 With x = 6

5 (6) - 10 = 25 it is not correct

6x - 18 = 6 With x = 4

6 (4) - 18 = 6 it is correct

4x + 12 = 40 With x = 7

4 (7) + 12 = 40 it is correct

8x + 12 = 28 With x = 3

8 (3) + 12 = 28 it is not correct