If you travel at a constant speed, you follow this formula:

where s is the space traveled, v is the speed and t is the time passed. Knowing the speed and the desired space, we can solve the equation for the time:

Plug your values:

And two-thirds of an hour are 40 minutes.
To convert his speed in miles per minutes, you only need to use that one hour is composed of 60 minutes:
miles per minute
9 because 9⁴ gives you that result, you can try on a calculator ;)
Four three -fourths are in three
Answer:
2x + y = 18
y = 4x - 12
x = 5, y = 8
Step-by-step explanation:
x = 1st number
y = 2nd number
We can use the substitution method as we know what 'y' equals; that value will get plugged in for 'y' in the first equation as follows:
2x + 4x - 12 = 18
6x - 12 = 18
6x = 30
x = 5
y = 4(5) - 12 which is 20-12 or 8
y = 8