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grin007 [14]
3 years ago
15

How many feet are there in a meter?

Mathematics
1 answer:
Nesterboy [21]3 years ago
7 0
There are 3.28084 feet in 1 meter.
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Solve the triangle. B = 36°, a = 38, c = 18
Gelneren [198K]

Answer:

A ≈ 119.7°, b ≈ 25.7, C ≈ 24.3°

Step-by-step explanation:

A suitable app or calculator does this easily. (Since you're asking here, you're obviously not unwilling to use technology to help.)

_____

Given two sides and the included angle, the Law of Cosines can help you find the third side.

... b² = a² + c² - 2ac·cos(B)

... b² = 38² + 18² -2·38·18·cos(36°) ≈ 661.26475

... b ≈ 25.715

Then the Law of Sines can help you find the other angles. It can work well to find the smaller angle first (the one opposite the shortest side). That way, you can tell if the larger angle is obtuse or acute.

... sin(C)/c = sin(B)/b

... C = arcsin(c/b·sin(B)) ≈ 24.29515°

This angle and angle B add to less than 90°, so the remaining angle is obtuse. (∠A can also be found as 180° - ∠B - ∠C.)

... A = arcsin(a/b·sin(B)) ≈ 119.70485°

4 0
3 years ago
One number is 8 times a first number. A third number is 100 more than the first number. If the sum of the three is 690, find the
mezya [45]
<h3>Given</h3>

Three numbers are n, 8n, and (100+n).

Their total is 690.

<h3>Find</h3>

the three numbers

<h3>Solution</h3>

n + 8n + (n+100) = 690

10n + 100 = 690 . . . . . . . simplify

10n = 590 . . . . . . . . . . . . subtract 100

n = 59

8n = 472

n +100 = 159

The three numbers are 59, 472, and 159.

6 0
3 years ago
-3|x|+2x-1 if x=-5<br><br> plz help
Savatey [412]

Answer:

 f(x) = -3|x| + 2x - 1

f(-5) = -3|-5| + 2*(-5) - 1

      = -3*5 + 2*(-5) - 1

      = -15 - 10 - 1

      = -26

Hope this helps!

:)

5 0
2 years ago
Read 2 more answers
3. Points Q, R, and S are the midpoints of the sides of triangle LMN. LM = 16, QR = 6, and QS = 10. Find the length of LN. The d
ss7ja [257]
Qr=1/2 mn = ms
mn=2 ms=12
ln^2=lm^2+mn^2 using phythagoras rule
ln^2=400
ln=20
5 0
3 years ago
Peter is planning on spendind 2/3 as many hours watching television this week as he did last week. Is Peter going to spend more
Law Incorporation [45]
Fewer because 2/3 is less than one whole
5 0
3 years ago
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