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attashe74 [19]
3 years ago
12

You ride your bike x miles per hour up a mountain for 45 minutes. On the way down the mountain, you ride your bike 3 miles per h

our faster. It takes 20 minutes to ride your bike down the mountain. How far did you ride your bike in total?
Mathematics
1 answer:
denpristay [2]3 years ago
7 0

Answer:

18/5 miles

Step-by-step explanation:

let d be the mountain dist path

upward biking

x miles - 1 hr

d 45 mins

3x/4 = d

riding down

x+3 - 60 min

d. - 20

(1/3)(x+3) = d

(x+3)/3 = 3x/4

4x+12 = 9x

x = 12/5

d =( 12*3)/(4*5)= 9/5

upward+downward = 2*(9/5) = 18/5

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Anna is reading a 300-page book. She can read a page in two minutes. If she has finished reading 75 percent of the pages, how ma
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Answer:

150 minutes

Step-by-step explanation:

If Anna read 75% of her 300-page book, then she has already read:

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If Anna has already read 225 pages, then she has:

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If Anna reads 2 minutes per page, then she has

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She has 150 minutes of reading left to finish her book.

By the way, it's weird to say you have 150 minutes of something to do. In real life 150 minutes = 2 1/2 hours. jfyi. Have a great day!

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