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kakasveta [241]
2 years ago
6

College roommates John and David were driving home to the same town for the holidays. John drove 55 mph, and David, who left an

hour later drove 60mph. How long will it take for David to catch up to John? If you’re answering can you give me the step-by-step because I don’t understand.
Mathematics
1 answer:
givi [52]2 years ago
7 0

Answer:

11 hours

Step-by-step explanation:

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The diameter of the moon is 2,160 miles. A model has a scale of 1 in : 150 mi. What is the diameter of the model?
Charra [1.4K]

Answer:

The diameter of the model is 14.4 inches.

Step-by-step explanation:

The Diameter of the moon = 2,160 miles

The scale on the model represents 1 in = 150 miles

Let the model represents k inches in 2,160 miles.

So, by the Ratio of Proportionality:

\frac{1}{150}   = \frac{k}{2160}

⇒k = \frac{2160}{150} \\\implies k =  14.4

or, k = 14.4 inches

⇒On the scale 2160 miles is represented as 14.4 inches

    Hence the diameter of the model is 14.4 inches.

3 0
3 years ago
Explain hovevou could estimate 22% of 78 to check if your answer is reasonable.
fomenos

Answer:

78 rounds to 80, so find 10% of 80 and double it. 10% of 80 is 8. So, 20% of 80 is 16. Then, 22% of 78 is a little more than 16.

78 rounds to 80, and 22% is a little less than 25%. 25% (or one-fourth) of 80 is 20. So, 22% of 78 is a little less than 20.

Step-by-step explanation:

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3 years ago
How do you solve this problem K/2+9=30
bonufazy [111]
11 that is the answer
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Not sure how to do this, I will give Brainiest for step-by-step instructions.
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Equation : y = 3x - 20

Since the right hand side is shaded,  the equation is y > 3x - 20.
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3 years ago
Adam bought A new pair of baseball cleats for $65 the sales tax is 5.5% what is the total cost in dollars that Adam will pay
Dmitry [639]
(65×5.5%)+65 = 68.575
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