Mathematics
coolbrainmd
12

1. The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2. True False 2. How many solutions exist for the system y = 2x + 5 and y = -0.2x - 4? one solution infinitely many solutions no solution 3. How many solutions exist for the system, x + y = 1 and y = -x + 1? infinitely many solutions one solution no solution

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(1) Answers
augusteblandine

1: (-1,-1) is (x, y) to see if it is a solution, you would just plug in x and y and see if the equation is true. -4 (-1) + 2(-1) = 2 4 + -2 = 2 2 = 2 CORRECT So... plug in x and y in the second equation to Make sure it works for that one too. -1 + -1 = -2 -2 = -2 CORRECT So, yes. (-1,-1) is a solution to both equations.

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