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blsea [12.9K]
3 years ago
13

3x - 12 + 6x + 9?/ Help Please

Mathematics
2 answers:
Alexeev081 [22]3 years ago
5 0
9x-3 because you combine like terms
iragen [17]3 years ago
3 0
Combine like terms first
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John is looking up at the top of the Empire State Building from 1 mi. away and measures the angle of elevation to be 11 degrees.
torisob [31]

Refer to the attached image.

Let the height of the Empire State Building = BC = 'x'

John is standing at distance from Empire State Building = AB = 1 mile

The angle of elevation = 11°

In triangle ABC,

Consider \tan 11^{\circ}= \frac{Perpendicular}{Base}

\tan 11^{\circ}= \frac{BC}{AB}

\tan 11^{\circ}= \frac{x}{1}

0.194= \frac{x}{1}

x = 0.194 mile

Since 1 mile =5280 feet

So, x = 0.194 \times 5280

= 1024.32 feet.

So, the height of the Empire State Building is 1024.32 feet.

8 0
3 years ago
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3 years ago
Simplify. a - {4 b - [ a - (5 b - c ) + 3 c - ( a - b - 9 c )]}
Vlad1618 [11]
The answer to this should be a-8b+13c

a - {4b - [a - (5b - c) + 3c - (a - b - 9c)]}
=a - {4b - [a - 5b + c + 3c - a + b + 9c]}
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=a - {4b + 4b -13c}
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Hope this helped :)
Have a great day
7 0
3 years ago
Giving thanks and brainliest for best answer &lt;3<br> ::
satela [25.4K]
I can help if I see the problem
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How do you graph y= 10.25x+5000
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Answer:

Step-by-step explanation:

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