John ran 3 2/5 miles in 7/8 hour. what's his average in miles per hour

He expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 3 unit and the width is fraction 1 over 3 unit, what is the perimeter of the rectangle in units? fraction 2 over 3 unit 1 unit 1fraction 2 over 3 units 2 units

What is the volume of the sphere shown below with a radius of 3?

Which of the following are accepted without proof in a logical system? check all that apply.