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lukranit [14]
3 years ago
8

Three eights of the cast in a musical have to sing. What fraction of the cast does not have to sing

Mathematics
2 answers:
lbvjy [14]3 years ago
5 0
5/8 of the cast does not have to sing. You find this by doing 8/8 - 5/8
pychu [463]3 years ago
3 0
3/8 has to sing
8/8 is all
all=haveto+don'thaveto
all=8/8
haveto=3/8
subsitute
8/8=3/8+don'thaveto
subtract 3/8 from both sides
8/8-3/8=5/8
5/8=don'thavetosing

answer is 5/8
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Answer:

18

Step-by-step explanation:

3 x 3 = 9

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5 0
3 years ago
1.) A 20° sector in a circle has an area of 21.5π yd².
a_sh-v [17]

<u>Part 1)</u> A 20° sector in a circle has an area of 21.5π yd².

What is the area of the circle?  

we know that

the area of a circle represent a sector of 360 degrees

so by proportion

\frac{21.5\pi }{20} =\frac{x}{360} \\ \\ x*20=360*21.5\pi \\ \\x=(360*21.5*3.14)/20\\ \\x= 1,215.18\ yd^{2}    

therefore

<u>the answer part 1) is</u>

The area of the circle is 1,215.18\ yd^{2}

<u>Part 2)</u> What is the area of a sector with a central angle of 3π/5 radians and a diameter of 21.2 cm?

we know that

the area of the circle is equal to

A=\pi r^{2}

where

r is the radius of the circle

in this problem we have

Diameter=21.2\ cm\\ r=Diameter/2\\r=21.2/2\\r= 10.6\ cm

<u>Find the area of the circle</u>

A=\pi r^{2}

A=\pi*10.6^{2}

A=352.8104\ cm^{2}

<u>Find the area of the sector</u>

we know that the area of the circle represent a sector of 2\pi radians

by proportion

\frac{352.8104}{2\pi }=\frac{x}{(3\pi/5)} \\\\x*2\pi=(3\pi*352.8104)/5\\ \\x= 105.84\ cm^{2}

therefore

<u>the answer part 2) is</u>

the area of the sector is

105.84\ cm^{2}

7 0
3 years ago
What is 15 hours and 60 minutes in simplest form
Lilit [14]
Good Afternoon,

Okay so we have 15 hours already, now we need to add 60 minutes, which is exactly an hour. 

So, 15 Hours + 1 Hour = 16 Hours. 

16 Hours is your answer, I hope I helped and good luck studying!

Thank you, 
Darian D. 
8 0
3 years ago
PLEASE HEELLLLP WILL MARK BRAINLIEST
Mrrafil [7]

Answer:

312km

Step-by-step explanation:

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2. Divide. 3744 / 12 = 312km sq.

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6 0
2 years ago
Read 2 more answers
Find the slope for (3,4) and (3,-4)
saveliy_v [14]

Answer:

undefined

The problem:

Find the slope for the line going through (3,4) and (3,-4).

Step-by-step explanation:

Line up points vertically and subtract.

Then put 2nd difference over 1st.

( 3 ,  4)

-(3  , -4)

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0      8

So the slope would have been 8/0 but this is undefined.

So the slope is undefined.

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7 0
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