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15 September, 01:33

Solve the system of linear equations by graphing. Round the solution to the nearest tenth as needed.

y + 2.3 = 0.45x

-2y = 4.2x - 7.8

(2.4, - 1.2)

(-1, 2.5)

no solution

infinitely many solutions

+5
Answers (1)
  1. 15 September, 04:01
    0
    Y + 2.3 = 0.45x

    y = 0.45x - 2.3

    -2y = 4.2x - 7.8

    -2 (0.45x - 2.3) = 4.2x - 7.8

    -0.90x + 4.6 = 4.2x - 7.8

    -0.90x - 4.2x = - 7.8 - 4.6

    -5.1x = - 12.4

    x = - 12.4 / - 5.1

    x = 2.4

    y + 2.3 = 0.45x

    y = 0.45 (2.4) - 2.3

    y = 1.08 - 2.3

    y = - 1.2

    solution is : (2.4, - 1.2)
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