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yan [13]
3 years ago
11

Select the correct answer.

Mathematics
1 answer:
algol [13]3 years ago
3 0

Answer:

its answer C. y=-8

Step-by-step explanation:

y=-8 passes through (-2, -8) and is parallel to y=3 because they're both horizontal

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It takes Ms. Campbell 5 times as long as it takes Ms. Dorsey to paint a room. If Ms. Dorsey
Aliun [14]

Answer:

Dorsey = 4.8 hours

Campbell = 24 hours

Step-by-step explanation:

It takes "x" hours for Dorsey

So, it will take 5 times more for Campbell, so

It takes "5x" hours for Campbell

Rate is inverse of time, so rates are:

Dorsey: 1/x

Campbell: 1/5x

We know Rate * Time = Work

When together, it takes 4 hours to finish a work, so we can write:

(\frac{1}{x}+\frac{1}{5x})4=1

Solving for x, we get the time of Dorsey:

(\frac{1}{x}+\frac{1}{5x})4=1\\(\frac{1}{x}+\frac{1}{5x})=\frac{1}{4}\\\frac{5+1}{5x}=\frac{1}{4}\\\frac{6}{5x}=\frac{1}{4}\\5x=24\\x=4.8

Dorsey takes 4.8 hours alone

Campbell takes 4.8 * 5 = 24 hours alone

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3 years ago
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Dennis_Churaev [7]
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A plane can fly 51 miles in 5 minutes. At this rate, how many miles can the plane fly in 18 minutes?
Vlad [161]

Answer:

183.6

Step-by-step explanation:

51÷5=10.2 10.2×18=183.6

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2 years ago
Are 20/24,24/28,28/32 equivalent fractions
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No, they are not.
Have a good day!
3 0
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If working together, brothers Tom and Jack can paint a wall in 4 hours, how much time would it take Jack to paint the wall alone
kiruha [24]
T+J=4 hours
x+2x=4 hours
3x=240 minutes
X=80 minutes
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3 years ago
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