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Romashka [77]
3 years ago
7

What number is 25% of 180

Mathematics
2 answers:
Burka [1]3 years ago
7 0
p\%=\frac{p}{100}\\\\25\%=\frac{25}{100}=\frac{25:25}{100:25}=\frac{1}{4}\\\\25\%\ of\ 180=\frac{1}{4}\ of\ 180=\frac{1}{4}\cdot180=\frac{180}{4}=\boxed{45}
TiliK225 [7]3 years ago
4 0
'what number' indicates an unknown value we can represent with 'x'

'is' indicates an equal sign.

25% = 0.25

'of' indicates multiplication.

x = 0.25 * 180

x = 45
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In plane ABC the measure of angle A equals 42° the measure of angle B is five times the measure of angle C find the measure of a
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Step-by-step explanation:

I think what is meant in the triangle ABC we have the three angles.

the sum of all angles in a triangle is airways 180 degrees.

so,

180 = A + B + C

180 = 42 + B + C

now, we know also that

B = 5×C

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138 = 6×C

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A TV set contains five circuit boards of type A, five of type B, and four of type C. The probability of failing in its first 500
Aleks04 [339]

Answer:

0.903264

Step-by-step explanation:

Given that a TV set contains five circuit boards of type A, five of type B, and four of type C. The probability of failing in its first 5000 hours of use is 0.03 for a type A circuit board, 0.04 for a type B circuit board, and 0.03 for a type C circuit board.

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Elza [17]

Answer:

9.9 feet.

Step-by-step explanation:

Solution:

- If the swing were to hang straight down, it would be hanging at an angle of -90 degrees from the horizontal. If it is moving from -45 degrees from the horizontal to -135 degrees from the horizontal, this means that it is swinging from 45 degrees to the right of the straight-down position to 45 degrees to the left of the straight-down position.

 

- The swing is of length L = 10 - 3 = 7 feet. Recall that it hangs from a beam 10 feet above the ground and the seat hangs 3 feet above the ground in its straight-down rest position.

 

- Let's consider the swing at one of its extreme positions where it makes an angle of 45 degrees from the vertical. In this position, you can imagine the swing forming a right triangle with the highest vertex angle being 45 degrees and the hypotenuse being L = 7 feet. To calculate the horizontal leg of this triangle, you would use the sine function.

 

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So,

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- But, this is only the horizontal distance that the swing traverses from one extreme position to hanging straight down. It needs to complete its motion and swing up to the other extreme position. So, in moving from one extreme position to the other, the swing traverses a horizontal distance of    

                                     2x = 2*4.95 feet = 9.9 feet.

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3 years ago
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