Tarmarra21 Tarmarra21

03-03-2017
Mathematics

contestada

Solve the system of equations and choose the correct ordered pair.

9x - 2y = 73
5x - 9y = 9

Solve the system of equations and choose the correct ordered pair 9x 2y 735x 9y 9 class=

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Faaaith1 Faaaith1

03-03-2017

The answer is A (9,4)

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wolf1728 wolf1728

03-03-2017

A) 9x - 2y = 73
B) 5x - 9y = 9
Multiply equation A by -5/9
A) -5x +1.1111111111 y = -40.5555555556 then add it to B
B) 5x - 9y = 9
-7.888888888 y = -31.555555555
y = 4

B) 5x - 9*4 = 9

B) 5x -36 = 9
B) 5x = 45
x = 9

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