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3 years ago

What’s 4/5 = 20/blank = blank/45

Mathematics

1 answer:

NNADVOKAT [17]3 years ago

8 0

4/5=20/25=36/45

There you go

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Thomas took 3h to paint a room. Brian could paint the same room in 6h. How long would it take for both of them to finish paintin

kaheart [24]

Answer:

2 hours

Step-by-step explanation:

If Thomas can paint 1/3 = 2/6 of the room in a hour and Brian can paint 1/6 of the room in an hour. Which means in an hour they can collectively paint 3/6 = 1/2 of the room. Now you need to find how long it would take then to paint 2/2 of the room. Knowing that 1/2+1/2 = 2/2, it would take them 2 hours to paint the room together

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2 years ago

An overzealous student burns a candle at both ends. One night she lights the top and bottom ends of a candle at the same time. T

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A. the distance covered by both ends = top distance+bottom distance

1.4 inches + 2.1 inches =3.5 inches

so each hour, both ends cover 3.5 inches

he time it'll take to burn the whole candle

10 inches/ 3.5 inches =2.857 hours

to find out how far from the top the flames meet,

1.4 inches x 2.854 hours = 4 inches

B. the middle of the candle is 10/2 = 5 inches

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x hours = 5/1.4 = 3.571 hours

Bottom : 2.1 inches × x hours = 5 inches

x hours = 5/2.1 = 2.38 hours

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3 years ago

Read 2 more answers

At a math competition 2 students can answer 40 questions in 1 hour. At the same rate, how many questions could 5 students answer

const2013 [10]

Answer:

25 questions

Step-by-step explanation:

At a math competition 2 students can answer 40 questions in 1 hour.

Therefore, 1 student can answer in 1 hour = $\frac{40}{2}$

= 20 questions

5 students can answer in 1 hour = 20 × 5 = 100 questions

60 minutes = 1 hour

15 minutes = $\frac{15}{60}$ = 0.25 hours

5 students can answer in 0.25 hours = 100 × 0.25

= 25 questions

5 students could answer 25 questions in 15 minutes.

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3 years ago

I have 12 apples, but I take 2, 3 are molding, 1 has a worm in it, I'm eating 1, and 3 fell on the floor... how much apples do I

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Answer:

12 counting the one you're eating

Step-by-step explanation:

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3 years ago

Which is expression is equivalent to 7(x+4)

Pepsi [2]

Answer:7x+28

Step-by-step explanation:

7×x = 7x

7×4 = 28

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3 years ago