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3 years ago

11

Given the triangle below, which of the following equations correctly representsthe relationship between a, b, and c?Triangle not

drawn to scale A cz B az 2abcos (90.)b a2 c2 2abcos (90.)

1 answer:

alukav5142 [94]3 years ago

7 0

A) it is the law of cosine

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3 years ago

Solve for x and y 9/x-4/y=8

borishaifa [10]

You can solve <span>9/x-4/y=8 for x or for y but NOT at the same time.

Solving for x: </span><span>9/x-4/y=8 Mult all 3 terms by xy to eliminate the fractions.

9(xy)/x - 4xy/y = 8xy => 9y - 4x = 8xy, or 9y = 4x + 8xy = 4x(1+2y)

then 9y = x [ 4(1+2y) ]
9y
therefore x = ------------
4(1+2y)

Solve for y using a similar approach.

</span>

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3 years ago