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ser-zykov [4K]
4 years ago
13

What is the answer to 76?

Mathematics
1 answer:
vovangra [49]4 years ago
7 0

Answer:

13.2 minutes or 13 minutes 12 seconds.

Step-by-step explanation:

1. Count how much water drains the first pump every minute. Let the volume of pool be D. Every minute first pump drains D/11 water.

2. Working together(6 minutes) First pump drains 6D/11 water, hence the second pump drains 5D/11 water.

3.Count how much water drains second pump per minute -> (5D/11)/6= 5D/66

4. It takes the second pump 66 minutes to drain pool 5 times, thus it takes 13.2(66/5) minutes to drain the pool, which is 13 minutes 12 seconds.

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3x+2y=-15 2x=-18 elimination
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Answer: (-9,6)


Step-by-step explanation:

3x+2y=-15

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First solve for x in second equation

2x=-18

2x/2=-18/2

X= -9

Now substitute your x into first equation to find y

3(-9)+2y= -15

-27+2y=-15

2y= -15+27

2y= 12

2y/2=12/2

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Ilia_Sergeevich [38]

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

6 0
3 years ago
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liq [111]

Answer:

4x + 5 is a polynomial as well as a binomial.

Step-by-step explanation:

The expression 4x + 5 has two monomials 4x and 5 and this makes it a binomial. Now, the second thing to keep in mind is, every binomial is also considered a polynomial as well.

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8

Step-by-step explanation:

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