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Semmy [17]
3 years ago
6

Brandon is training for 200 meter dash. His best running time so far was 31.25 seconds. If Brandon wants to run the dash in 27 s

econds, how much time must he cut in order to reach his goal?
Mathematics
2 answers:
sleet_krkn [62]3 years ago
8 0
4.25 seconds subtract 27 from 31.25
raketka [301]3 years ago
3 0

Just subtract 27 from 31.25

31.25-27=4.25

Brandon must cut 4.25 seconds

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All real numbers less than 0

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A cyclist travels at 20 kilometers per hour when cycling uphill, 24 kilometers per hour when cycling on flat ground, and 30 kilo
Dvinal [7]

Answer:

Their average speed during the entire round trip = 24 miles per hour

Step-by-step explanation:

To determine:

What was their average speed during the entire round trip?

Information Fetching and Solution Steps:

  • A cyclist travels at 20 kilometers per hour when cycling uphill
  • 24 kilometers per hour when cycling on flat ground
  • 30 kilometers per hour when cycling downhill

On a sunny day, they cycle the hilly road from Aopslandia to Beast Island before turning around and cycling back to Aopslandia.

Let us assume that that the road is uphill one way and downhill the other way

As we know that the formula of average speed

Average\:speed=\:\frac{Total\:Distance\:\:Covered}{Total\:Time\:taken\:to\:cover\:the\:distance}\:\:

  • As\:they\:do\:an\:out\:and\:back\:trip

The\:up\:and\:down\:portions\:reverse\:and\:the\:flat\:remains\:the\:same

On the way out:

Say              

60\:miles\:up\:hill=\:3\:hours

flat\:48=\:2\:hrs

down\:120=4\:hrs

on the way back:

up\:120\:=\:6\:hrs

flat\:48=\:2\ hrs

down\:60=\:2\:hrs

So,

total\:miles\:=\:456\:miles

total\:time\:=\:19\:hrs\:\:\:

As

Average\:speed=\:\frac{Total\:Distance\:\:Covered}{Total\:Time\:taken\:to\:cover\:the\:distance}\:\:

Therefore,

Average\:speed=\:\frac{456}{19}\:\:\:

                        = 24 miles per hour

Hence, their average speed during the entire round trip = 24 miles per hour

Keywords: speed, time, average speed

Learn more about average speed from brainly.com/question/13159889

#learnwithBrainly

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3 years ago
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Answer:

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Step-by-step explanation:

Points on the graph: ( -4, 0) and (1, -5)

Slope:

m=(y2-y1)/(x2-x1)

m=(-5-0)/(1-4)

m=(-5)/(-3)

m=5/3

Slope-intercept:

y - y1 = m(x - x1)

y - 0 = 5/3(x + 4)

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3 0
3 years ago
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Goshia [24]
Solve the two inequalities.
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