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LuckyWell [14K]
3 years ago
13

An olympic sprinter can run 56 yards in 8 seconds. At the same rate, how long (in seconds) would it take the sprinter to run 81

m? Round your answer to one decimal place.
Mathematics
1 answer:
aniked [119]3 years ago
6 0

Answer:

20,365.7 seconds

Step-by-step explanation:

First, we need to know how to convert yards to miles, as the question is in miles. We know that 1 mile is equivalent to 1760 yards. So we have:

1 mi = 1760 yards

If we multiply both sides by 81:

81 mi = 142,560‬ yards

And we know that the sprinter needs 8 second to run 56 yards:

8 s = 56 yards

If we divide both sides by 56 we get the time he needs for 1 yard:

8/56 s = 56/56 yards

1/7 s = 1 yard

So, takes him 1/7 seconds to run one yard. At this rate he runs 142,560 yards in:

(1/7) * 142,560 = 20,365.7

So, he needs 20,365.7 seconds to run 81 miles (142,560 yards)

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6 0
3 years ago
12
weeeeeb [17]

Answer:

2x + y = -4

Step-by-step explanation:

standard form of equation of straight line is

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that  is terms containing x and y should be  on LHS and constant term should be  on RHS

______________________________________________

Given equation

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lets bring -2x on LHS ,

add 2x on lHS and RHS

y + 1  + 2x = - 2x - 3 + 2x

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on lHS, 1 is there which constant term lets bring it on RHS

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rearranging it

2x + y = -4  (Answer)

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the price of a sandwich is $1.50 more than the price of a smoothie,which is d dollars.What does the expression d+1.5 represent?
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