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27 August, 20:13

What is the solution to this system of equations?

t + w = 15

2t = 40 - 2w

a. The system has no solution.

b. The system has infinite solutions.

c. The system has a single solution: t = 5, w = 10.

d. The system has a single solution: t = 10, w = 5.

e. The system has a single solution: t = 7.5, w = 7.5.

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Answers (1)
  1. 27 August, 20:41
    0
    2t = 40 - 2w

    t = 40/2 (-2/2) w

    t = 20 - w - - rearrange

    t = - w + 20

    t + w = 15

    t = - w + 15

    same slope, different y intercepts ... parallel lines, no solutions
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