The perimeter of a rectangle is 140 ya minus the width. the length of the rectangle is twice the width. find length and width

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs