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3 years ago

10

Seven times a number minus the number is -48. Find the number. In the form of a paragraph, explain in complete sentences the nex

t steps necessary to completely solve the equation for the unknown value. Include the final answer in your explanation.

1 answer:

ale4655 [162]3 years ago

6 0

Answer:-8

Step-by-step explanation:

I plugged in -8 for each and got -48.

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A tower casts a shadow that is 60 feet long when the angle of elevation of the sun is 65˚. How tall is the tower? Round answer t

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Answer: Tthe tower is 129 feet tall.

Step-by-step explanation:

According to trigonometry in a right triangle:

$\tan\theta =\dfrac{\text{Side opposite to }\theta}{\text{Side adjacent to }\theta}$

Let x be the height of the tower.

Given , $\theta=65^{\circ}$

Since tower stands vertical to the ground, that means it is making a right triangle with the shadow.

$\tan 65^{\circ}=\dfrac{x}{60}\\\\\Rightarrow\ 2.1445=\dfrac{x}{60}\ \ \text{[Using calculator]}\\\\\Rightarrow x= 2.1445\times60=128.67\approx129\text{ feet}$

Hence, the tower is 129 feet tall.

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Step-by-step explanation:

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part 1:

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Step-by-step explanation:

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