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3 years ago

Solve using substitution y = 4 and - 4x – 3y = 12 Give the answer as an ordered pair.

Mathematics

1 answer:

Bas_tet [7]3 years ago

7 0

Answer:

(-6,4)

Step-by-step explanation:

since (y) is already solved, you would substitute the y in the second equation so:

y=4 and -4x-3y=12

-4x-3(4)=12 ( Distribute )

-4x-12=12.

( add 12 to both sides to remove the constant )

-4x=24

( divide both sides by the coefficient so -4)

x=-6

now write it as an ordered pair (x,y): (-6,4)

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${ \tt{ = (6 \cos(20\pi t) \cos(\pi) + 6\sin(20\pi t) \sin(\pi) ) + 6 \sqrt{3} ( \cos(20\pi t) \cos( \frac{\pi}{2} ) + \sin(20\pi t) \sin( \frac{\pi}{2} )) }} \\ = { \tt{ (- 6t + 0) + (0 + 0)}} \\ = { \tt{ - 6t}}$

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