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14 November, 21:59

The angles in a triangle are represented by 5x, 8x, and 2x+9. What is the value of?

A. 10.8

B. 11.4

C. 9.7

D. 7.2

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Answers (2)
  1. 14 November, 23:17
    0
    B. 11.4

    Step-by-step explanation:

    The sum the 3 angles of a triangle add to 180 degrees

    5x+8x+2x+9 = 180

    15x+9 = 180

    Subtract 9 from each side

    15x+9-9 = 180-9

    15x = 171

    Divide by 15

    15x/15 = 171/15

    x = 11.4
  2. 15 November, 00:08
    0
    11.4

    Step-by-step explanation:

    Add 5+8+2

    You get 15

    So 15x

    Then subtract 9 from 180.

    180 minus 9 is 171

    Divide by 15

    You get 11.4
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