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Katena32 [7]
2 years ago
13

Match the expressions with rational exponents to their simplified forms.

Mathematics
1 answer:
Misha Larkins [42]2 years ago
6 0

do it yourself

Step-by-step explanation:

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Peter leaves Mitchell's house traveling 30 mph. Mitchell leaves 15 min later, trying to catch up to peter, going 40 mph. if they
UkoKoshka [18]

Answer:

  45 minutes

Step-by-step explanation:

At 30 mph for 1/4 hour, Peter has a 7.5 mile head start. After he leaves, Mitchell closes that gap at the rate of 40-30 = 10 miles per hour. It will take him ...

  t = d/s

  t = (7.5 mi)/(10 mi/h) = 0.75 h

to catch Peter.

Mitchell will catch Peter in 45 minutes.

__

<em>Alternate Solution</em>

Another way to look at it is that Mitchell's 10 mph advantage is 1/3 of Peter's speed, so it will take 1/(1/3) = 3 times the period of Peter's head start:

  3 × 15 minutes = 45 minutes . . . for Mitchell to catch Peter

_____

You can write equations involving time and distance and see where the distances traveled become the same. You need to be careful choosing the time reference, since you're concerned with Mitchell's travel time. I personally prefer to work "head start" problems by considering the differences in time and speed, as above. This is where you end up using the equations approach, anyway.

4 0
3 years ago
WILL GIVE BRAINLY!!<br>Evaluate the following expression. (20 – 16)³ - 15
QveST [7]

Answer:

49

Step-by-step explanation:

5 0
3 years ago
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Multiple 24 by 8.95 I need to show the work. I don’t know the steps
hjlf

Answer: 214.8

Step-by-step explanation:

First move the decimal to the right, in this case 8.95 = 895., then multiply the 24 by 895. to get 21480., you then move the decimal to the left and you get 214.80 or 214.8.

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1 year ago
A Spanish class has a total of
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There are seven females and nineteen males in the spanish class.

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It would be $9 for 6 avocados
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