3 years ago

What is the speed of a runner who completes the 800 m race in one minute and 40 seconds?

1 answer:

7 0

Answer: 8 m/s

First let’s convert the time to seconds. There are 69 seconds in a minute so 1 minute and 40 seconds is 60 +40 second which totals to 100 seconds
Now to get the speed in meters per second we divide the total meters run by the total seconds
So the speed will be 800m/100s = 8m/s

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The answer will be the last one as it equals 4x + 3. this means that the equation will be parallel and does not have a solution.

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2 years ago

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Fiesta28 [93]

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2 years ago

What is the markup percent on a diamond for which the markup is $870 and the selling price is $2870?

ryzh [129]

Answer:

30.31%

Step-by-step explanation:

Mark up on selling price is given by markup*100%/selling price

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2 years ago

There are 26 3rd graders in 32 4th graders going on a field trip each van can carry 10 students how many students will be in eac

Katen [24]

Answer:

There will be 10 students in each van, and only 8 in one van

Step-by-step explanation:

26 + 32 = 58

4 0

2 years ago

A ball is thrown from an initial height of 1 meter with an initial upward velocity of 25/ms. The ball's height h (in meters) aft

Lina20 [59]

Set h =11
11=-5t^2+25t+1
-5t^2+25t-10=0
Now use quadratic formula to solve for t

t=[-b+\-sqrt(b^2-4ac)]/(2a)
t= [-25+\-sqrt((25)^2-4(-5)(-10))]/2(-5)
t= .438sec and 4.562sec

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