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olya-2409 [2.1K]
3 years ago
12

Javon spends 3 more hours on homework per week than michelle. if michelle spends m hours per week on homework, how many hours do

es javon spend?
a. m-3
b. m+3
c. 3m
d. 3m+3
Mathematics
2 answers:
Zepler [3.9K]3 years ago
6 0
I think the answer is C
Nadya [2.5K]3 years ago
5 0

Answer:

b

Step-by-step explanation:

you need to add

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Q. Fine Floors can install 15 square yards of carpeting in 4 hours and 30 minutes. At this rate, how
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It takes 5.22 hours to install carpeting in a room

Step-by-step explanation:

At first lets find the relation between yard, feet and inch

1. 1 yard = 3 feet

2. 1 foot = 12 inches

3. 1 yard = 36 inches

Let us change all measures to inches

∵ 1 yard = 36 inches

∴ 1 yard² = (36)² inches²

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∵ 15 yard² = 15 × (36)² inches²

∴ 15 yards² = 19440 inches²

∵ 1 hour = 60 minutes

∴ 30 minutes = 30/60 = 0.5 hour

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∵ The dimensions of the room are 11 feet 9 inches by 13 feet 4 inches

∵ 1 foot = 12 inches

∴ 11 feet 9 inches = 11 × 12 + 9 = 141 inches

∴ 13 feet 4 inches = 13 × 12 + 4 = 160 inches

∴ The area of the room = 141 × 160 = 22560 inches²

Now lets use the ratio method to answer the question

⇒ area of carpeting (in²)      :      time of carpeting (hr)

⇒ 19440                                :      4.5

⇒ 22560                               :      h

By using cross multiplication

∴ 19440 h = 4.5 × 22560

∴ 19440 h = 101520

- Divide both sides by 19440

∴ h = 5.22 hrs

It takes 5.22 hours to install carpeting in a room

Learn more:

You can learn more about the rate in brainly.com/question/13053630

#LearnwithBrainly

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Step-by-step explanation:

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