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miv72 [106K]
3 years ago
10

Darryl can paint a fence in nine hours. Alberto can paint the same fence in eight hours. Find how long it would take them if the

y worked together
Mathematics
1 answer:
IRINA_888 [86]3 years ago
3 0

Answer:

4 hours

Step-by-step explanation:

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The energy released by metabolism of 1 average candy bar is 1 x 10^6 joules.
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Answer: 32

Step-by-step explanation:

Given: The energy needed for 1 hour of running for an adult =4.5\times10^6\ joules.

Therefore. the energy needed for seven hours of running==7\times4.5\times10^6\ joules.=31.5\times10^6\ joules

Since, he energy released by metabolism of 1 average candy bar =1\times10^6\ joules.

Therefore, the number of candy bars an adult need to eat  to supply the energy needed for seven hours of running.=\frac{31.5\times10^6}{1\times10^6}=31.5\approx32

Hence, the adult need to eat 32 candies to supply the energy needed for seven hours of running.

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sineoko [7]

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A since if we multiply 4 × 4x, we get 16x, and 4 × 4, we get 16, which cancels with the other 16x - 16 on the left side. That makes sure that any x we choose will cancel out in the end.

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1. 16x - 16 = 4(4x-4)

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