An airplane is traveling at 400 miles per hour. which equation can be used to find the total distance the plane will travel in h hours?

1. d = h ÷ 400

2. d = h + 400

3. d = 400 x h

4. d = 400 - h

The equation that can be used to find the total distance the plane will travel in h hours is d = 400 × h

Total distance traveled by the plane = d miles

Total hours traveled = h hours

total speed of the plane = 400 miles per hour

Distance traveled = speed × time

d = 400 × h

d = 400h

Therefore, the equation that can be used to find the total distance the plane will travel in h hours is d = 400 × h

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For this question, all we need to do is to apply the formular to calculate the distance since we already had the time which is h hours and the speed which is 400 miles per hour:

d = v × t = 400 × h

So the correct answer is number 3.

answer: for each 3 girls there is 2 boys . 3: 2

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-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0