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3 years ago

Question is WHY DIVIDE BY 8?? in the 5th step??

Mathematics

1 answer:

rusak2 [61]3 years ago

4 0

Answer:

I agree with you that step 5 doesn't make sense.

In step 4 he had accurately determined that there were 216 British and Indian stamps.

B = number of British stamps

N = number of Indian stamps (using N because "I" looks too much like a "1")

B + N = 216

3/5B = N

substitute for N:

B + 3/5B = 216

8/5B = 216

divide both sides of the equation by 8:

1/5B = 27

multiply both sides of the equation by 5:

B = 135

N = 81

It appears that step 5 is missing the "multiply by 5".

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Ksju [112]

The question is not written properly! Complete question along with answer and step by step explanation is provided below.

Question:

The charge to rent a trailer is $25 for up to 2 hours plus $9 per additional hour or portion of an hour.

Find the cost to rent a trailer for 2.8 hours, 3 hours, and 8.7 hours.

Then graph all ordered pairs, (hours, cost), for the function.

Answer:

ordered pair = (2.8, 34)

ordered pair = (3, 34)

ordered pair = (8.7, 88)

Step-by-step explanation:

Charge for 2.8 hours:

$25 for 2 hours

$9 for 0.8 hour

Total = $25 + $9

Total = $34

ordered pair = (2.8, 34)

Charge for 3 hours:

$25 for 2 hours

$9 for 1 hour

Total = $25 + $9

Total = $34

ordered pair = (3, 34)

Charge for 8.7 hours:

$25 for 2 hours

$9 for 1 hour

$9 for 0.7 hour

Total = $25 + $9 + $9 + $9 + $9 + $9 + $9 + $9

Total = $88

ordered pair = (8.7, 88)

The obtained ordered pairs are graphed, please refer to the attached graph.

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Step-by-step explanation:

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