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Liono4ka [1.6K]
1 year ago
13

Three-fourths of people at the concert are children. If there are 87 children, what is the total number of people at the concert

?
Mathematics
1 answer:
dusya [7]1 year ago
5 0

Answer:

65

Step-by-step explanation:

87 times .75 is 65.25 but since a quarter if a persone does not make sense in this context we round down to the nearest whole number

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Three even numbers sum up to 162. the smallest is half the largest and the middle number is 3/4 the largest. what are the three
Scrat [10]
Lets name the largest number as x 
smallest number is half the largest , therefore its x/2 = 0.5x
then middle number is 3/4 the largest , therefore its 3/4x = 0.75x
the sum of the three numbers are 162
the three numbers added are 
x + 0.5x + 0.75x = 162
2.25 x = 162
x = 72
the largest number is 72
then middle number 0.75 x = 0.75 x 72 = 54
smallest number is 0.5x = 0.5 x 72 = 36
answer is  -   36,54,72
3 0
3 years ago
What is the exact value of arccos(−2√2) ?
Strike441 [17]

Answer:

See explanation

Step-by-step explanation:

The range of the cosine function is -1\le \cos x\le 1

Therefore arc \cos (-2\sqrt{2}) is not defined.

Assuming your question is rather arc \cos (-\frac{\sqrt{2}}{2})

Then arc \cos (-\frac{\sqrt{2}}{2})=\pi-arc \cos (\frac{\sqrt{2}}{2})  in the second quadrant.

arc \cos (-\frac{\sqrt{2}}{2})=\pi-\frac{\pi}{4}

arc \cos (-\frac{\sqrt{2}}{2})=\frac{3\pi}{4}

4 0
3 years ago
Samantha is wall papering her bedroom and wants to make sure that she bought enough wall paper. Each wall in her room measures 1
Gala2k [10]

Answer:

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Step-by-step explanation:

Look at the room carefully, the length of the room is 11 feet

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3 years ago
Carol drove to her sister's house. she drove from 6:38 to 9:45. how long did she drive?
Marrrta [24]
The answer isn't part of any of the choices that are up there The answer should be 3 Hours and 7 Mins
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3 years ago
Read 2 more answers
How many triangles exist with the given angle measures ?
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