Mercedes rode her skateboard at a speed of 20 miles per hour. Which statement is correct? * If she covered 4 miles, she rode for 5 hours.
If she covered 40 miles, she rode for 2 hours.
If she covered 10 miles, she rode for 0.25 hours.
If she covered 4 miles, she rode for .15 hours

Step-by-step explanation:

number 1    

,jkulgiurutrjyftkugyi.uykujuyxjdkytuf,yukj

step-by-step explanation:

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus