PRESTEST:1.1.5: Solutions of Equations and Inequalities

Is x = 3 a solution to the equation x + 7 = 11?

• No, because 3 + 7 = 11 is not true.

• No, because 3 + 7 = 11 is true.

• Yes, because 3 + 7 = 11 is not true.

• Yes, because 3 + 7 = 11 is true.

Is x = 6 a solution to the equation x + 13 = 18?

• No, because 6 + 13 = 18 is not true.

• No, because 6 + 13 = 18 is true.

• Yes, because 6 + 13 = 18 is not true.

• Yes, because 6 + 13 = 18 is true.

Is x = 8 a solution to the equation x + 7 = 15?

• Yes, because 8 + 7 = 15 is true.

• Yes, because 8 + 7 = 15 is not true.

• No, because 8 + 7 = 15 is not true.

• No, because 8 + 7 = 15 is true.

Which equation has a solution of x = 3.5?

• 2x = 7

• 8 – x = 3.5

• x + 4 = 3.9

• 3x = 10

Which equation has a solution of x = 4.5?

• 3x = 13.5

• 7 – x = 3.5

• x + 4 = 4.9

• 2x = 10

Which equation has a solution of x = 5.5?

• 4x = 22

• 8 – x = 3.5

• x + 4 = 5.9

• 2x = 12

Is either x = 3 or x = 7 a solution to 24 – x = 20?

• Neither is a solution.

• x = 3 is a solution, but x = 7 is not.

• They are both solutions.

• x = 7 is a solution, but x = 3 is not.

Is either x = 6 or x = 4 a solution to 33 – x = 27?

• x = 6 is a solution, but x = 4 is not.

• Neither is a solution.

• They are both solutions.

• x = 4 is a solution, but x = 6 is not.

Is either x = 5 or x = 9 a solution to 31 – x = 22?

• x = 9 is a solution, but x = 5 is not.

• Neither is a solution.

• They are both solutions.

• x = 5 is a solution, but x = 9 is not.

Which inequality is true if x = 18?

• 25 – x > 8

• 0.5x < 7