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arlik [135]
3 years ago
6

Factor . X2-x-56=0 PLEASE HELP!!!

Mathematics
1 answer:
defon3 years ago
6 0

Answer:

use factoring x (see attachment)

-8 x 7 = -56

-8 + 7 = -1

(x - 8)(x + 7) = 0

x = 8, -7

hope this helps :)

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The sum of three consecutive integers is -51 what is the value of the smallest number
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Read 2 more answers
3. Two cars are parked, 150m apart, and on opposite sides of a building. A camera on the top of the building rotates and can vie
allsm [11]

Answer:

<em>The building is 61.5 m tall</em>

Step-by-step explanation:

The image below is a diagram where all the given distances and angles are shown. We have additionally added some variables:

h = height of the building

a, b = internal angles of each triangle

x  = base of each triangle

The angles a and b can be easily found by subtracting the given angles from 90° since they are complementary angles, thus:

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Now we apply the tangent ratio on both triangles separately:

\displaystyle \tan a=\frac{\text{opposite leg}}{\text{adjacent leg}}

\displaystyle \tan 53^\circ=\frac{150-x}{h}

\displaystyle \tan 48^\circ=\frac{x}{h}

From the last equation:

x=h.\tan 48^\circ

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\displaystyle \tan 53^\circ=\frac{150-h.\tan 48^\circ}{h}

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\displaystyle \tan 53^\circ=\frac{150}{h}-\tan 48^\circ

Rearranging:

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5 0
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