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3 years ago

If I ran 2/25 of a mile in 30 seconds how long would it take me to run 1 mile?

Mathematics

2 answers:

Leya [2.2K]3 years ago

8 0

You should get 375 seconds which is 6 1/4 of a minute or 6 minutes and 15 seconds

Andreas93 [3]3 years ago

6 0

Well to find this answer, we will have to find out how many pairs of 30 seconds there are in an hour. Since there are 60 minutes in an hour, and there are 30 seconds in a minute, we can conclude that there are 120 pairs of 30 seconds in an hour. So our equation would be 2/25 × 120. So our answer would be that you could run 9 and 3/5 of a mile in one hour. hope I helped!

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The length of a rectangle is 7 more than the width the area is 744 square centimeters find length and width of rectangle

andrezito [222]

Answer:

$l=31\ cm\\\\w=24\ cm$

Step-by-step explanation:

The formula that is used to calculate the area of a rectangle is:

$A=lw$

Where "l" is the lenght and "w" is the width.

You know that the area of that rectangle is:

$A=744\ cm^2$

And, according to the exercise, its lenght is 7 more than its width; then:

$l=w+7$

Then, you can make the corresponding substitution into the formula $A=lw$ :

$744=(w+7)w$

Simplify:

$744=w^2+7w\\\\w^2+7w-744=0$

Factor the equation. Find two numbers whose sum is 7 and whose product is -744. These are 31 and -24.

Then, you get:

$(w-24)(w+31)=0\\\\w_1=24\\\\w_2=-31$

The width of the rectangle is the positive value:

$w=24\ cm$

Then, the lenght is:

$l=24+7\\\\l=31\ cm$

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3 years ago

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Alenkinab [10]

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3 years ago

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3 years ago

What did you include in your response? Check all that

Fantom [35]

You can pick any of them it won’t hold it against you.
I do it all the time.
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3 years ago

Read 2 more answers

I need help with this and I don’t understand it

DochEvi [55]

Lets break it down:

The bottom right picture shows an approximation of what 1 wingspan length is, and the goal is to estimate lengths.

A. 1 wing is approx. 7 meters. To find the wingspan of the plane just do 7 meters multiplied by 2 = 14 meters (approx wingspan). Now we convert (remember, to the nearest foot!)

14 meters = 45.93 ft

Round it to the nearest foot = 46 ft is your approx. wingspan.

B. The height. This is one is a little tricky! Lets try to use what we know:

1 wing is approx. 7 meters. Since these are approximations, lets say half of one wing is roughly the size of the height of the plane. Since these are approximations I'd say 4 meters.

4 meters = 13 ft (rounded).

I checked online for the specs of the Lysander and the exact height is 14 ft 6 in and wingspan is 50 ft. This means our approximations were correct!

C. The length would be 10 ft + 7 meters

10 ft = 3 meters (rounded)

3 meters + 7 meters = 10 meters

(converting to meters then to ft at the end because it's less messy)

10 meters = 33 ft (rouned)

length of the Lysander is approx. 33 ft!

(the real length is 30 ft 6 in)

This means our approximations were correct once more.

Hopefully this helped you and made your night/day easier.

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3 years ago