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3 years ago

I need help -Geometry

Mathematics

1 answer:

Fofino [41]3 years ago

8 0

Step-by-step explanation:

We apply the pythagorean theorem on ABC.

AC^2=11^2+60^2 = 3600 + 121 = 3721

AC=61

Which means that sin(BAC) = 60/61.

However, sin^2(BAC) + cos^2(BAC)=1.

3600/3721 + cos^2(BAC) = 3721/3721.

cos^2(BAC) = 121/3721.

BAC is an acute angle so the cos is a positve number.

cos(BAC) = 11/61.

Lastly, x/60 = cos(BAC), so x= 660/61

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RideAnS [48]

Answer:

x = 4 and y = 0

Step-by-step explanation:

Using the elimination method:

4(-x + 5y=-4) --> -4x + 20y = -16.

Now we add -4x + 20y = 016 and 4x + 3y = 16. This gives us 23y = 0 or just y =0.

Now we can find x by plugging in y.

-4x + 0 = -16.

Divide by -4 on both sides -> x = 4.

If you want to double check you can plug your values into -4x + 20y = -16.

-4(4) +20(0) = -16.

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aliya0001 [1]

Answer:

Step-by-step explanation:

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Rainbow [258]

Answer:

$\large\boxed{a.\ -30}$

Step-by-step explanation:

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Step-by-step explanation:

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