Supplementary Angles with Equations Practice

If m∠A= 3x - 14 and m∠B = 8x +7, what does x equal?

• 16

• 143

• 17

• 129

Which equation would you use to solve for "x"?

• (180 -123)/3 = x

• 123 + 3x = 90

• 123 + 3x = 180

If x = 10, use evaluation to determine the measures of these angles.

• 110° and 70°

• 120° and 60°

• 130° and 50°

• 140° and 40°

Which equation would you use to find the value of x?

• 6x + 12 + 3x -3 = 90

• 6x + 12 + 3x -3 = 180

• 9x +9 = 90

Question:

• 18

• 19

• 66

• 77

Use the equation from before to solve for x.

• -5

• 28

• 19

• -3

Using the value for x, what is the measures of each angle?

What is the value of "a"?

• 75°

• 65°

• 55°

• 85°

Which equation would be needed to solve for x.

(not arithmetic)

• 2x + 10 + 4x + 20 = 180

• 2x + 10 - 4x + 20 = 180

• 36x = 180

Solve for x

• 20

• 25

• 120

• 180