Here some free 50 Points ^^
And if you know who call Katsuki, Kacchan! ^^

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie