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21 June, 13:37

1. A pair of supplementary angles is shown. One angle measures 10x and the other angle measures 70 degrees.

What is the value of x?

A) 10°

B) 11°

C) 20°

D) 21°

2. A right angle is shown divided in two parts. The measure of the angle of one part is 30 degrees and the measure of the other part is 5x plus 15 degrees. What is the value of x?

A) 3

B) 9

C) 12

D) 15

+4
Answers (2)
  1. 21 June, 14:02
    0
    1) 10x+70 = 180

    10x = 180-70

    10x = 110

    x = 11

    2) 5x+15+30 = 90

    5x = 90-45

    x = 45/5

    x = 9
  2. 21 June, 14:54
    0
    1.

    supplementary add to 180

    10x+70=180

    minus 70 both sides

    10x=110

    divid both sides by 10

    x=11 degrees

    B

    2.

    right angle is 90 degrees

    30+5x+15=90

    5x+45=90

    minus 45 both sides

    5x=45

    divide 5 both sides

    x=9

    B

    1. B

    2. B
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Home » Mathematics » 1. A pair of supplementary angles is shown. One angle measures 10x and the other angle measures 70 degrees. What is the value of x? A) 10° B) 11° C) 20° D) 21° 2. A right angle is shown divided in two parts.
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