3 years ago

the perimeter of the quadrilateral is 49 centimeters. find the length of each side. x+9 , x^2-2x , x+4 , 3x-4

1 answer:

3 0

X= 5 or -8

Add all the like terms and set it equal to 49, use quadratic formula or factoring.

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Oksi-84 [34.3K]

The answer is 3+-i

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Murljashka [212]

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kaheart [24]

I’m going to say the top one it seems like that would be correct

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Paladinen [302]

Recall that

$\vec a\cdot\vec b=\|\vec a\|\|\vec b\|\cos\theta$

where $\theta$ is the angle between the vectors $\vec a,\vec b$ whose magnitudes are $\|\vec a\|,\|\vec b\|$ , respectively.

We have

$\langle6,4\rangle\cdot\langle7,5\rangle=\sqrt{6^2+4^2}\sqrt{7^2+5^2}\cos\theta$

$\cos\theta=\dfrac{31}{\sqrt{962}}\implies\theta\approx88.2^\circ$

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3 years ago

liraira [26]

You should ask your parent/guardian
or teacher if needed! Merry Christmas!

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3 years ago