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pochemuha
2 years ago
15

If mln, solve for x. (3x+9)(x+21)

Mathematics
1 answer:
Lilit [14]2 years ago
4 0
(3x+9)+(x+21)=90
4x+30=90
4x=60
60/4=15
X=15
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Answer:

C. Multiply 3 by 18

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Measure the length of AC. Use coordinate algebra to locate a point E on ACsuch that the ratio of AE to EC is equal to the ratio
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A plane has an altitude of 23760 feet which expression can I use to find the altitude in miles
Lyrx [107]

Perhaps we can treat this as a "distance to horizon" problem, the observer is 7 mi above the earth

One formula is: d+=+sqrt%28%283h%29%2F2%29 where d is in miles and h is in feet

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d = sqrt%28%283960%2A3%29%2F2%29

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6 0
3 years ago
24/2=_/3=_/5.5=108/_=_/15
ANTONII [103]

Answer:

The answer is 24/<u>2</u>=<u>36</u>/3=<u>66</u>/5.5=108/<u>9</u>=<u>180</u>/15.

Step-by-step explanation:

Given:

24/2=_/3=_/5.5=108/_=_/15.

Now, we need to solve this by putting x in the place of _ and then continue:

\frac{24}{2} =\frac{x}{3}

<em>By</em><u><em> cross multiplication we get:</em></u>

72=2x

By dividing with 2 we get:

36=x

Now, <u><em>we will continue like this process:</em></u>

\frac{36}{3}=\frac{x}{5.5}

198=3x

x=66

And, then again:

\frac{66}{5.5}=\frac{108}{x}

66x=594

x=9

And, last:

\frac{108}{9}=\frac{x}{15}

9x=1620

x=180

Therefore, the answer is 24/<u>2</u>=<u>36</u>/3=<u>66</u>/5.5=108/<u>9</u>=<u>180</u>/15.

6 0
3 years ago
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