Learning Mathematical Variables

Is x = 7 a solution to the equation

3x - 4 = 15

• No

• Yes

Is w = 8 a solution to the equation

21 - w = 13?

• No

• Yes

Is y = 1 a solution to the equation

5 + 3y = 8?

• No

• Yes

If x = 47, what is the value of the expression

x + 24

• 23

• 24

• 47

• 71

If r = 15, what is the value of the expression 16r ?

• 15

• 31

• 240

• 1615

Use substitution to determine which of the following is a solution for b in the equation:

b - 21 = 8

• b = 23

• b = 21

• b = 29

• b = 25

Is z = 3 in the solution set of the inequality

7z < 15

• Yes

• No

Is x = 12 in the solution set of the inequality

x - 2 > 11

• Yes

• No

Is y = 8 in the solution set of the inequality

5y < 35

• Yes

• No

Use substitution to determine which of the following values for y are in the solution set of the inequality:

4 + 4y > 25

Choose all that are true.

• y = 5

• y = 4

• y = 6

• y = 7