if 2x square 4 + 2y square four + 2z square four = 144, what is the mean of x square four, y square four and z square four

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?