Why is it writing always a parallelogram parallelogram is not always a rectangle

Which function can be used to model the monthly profit for x trinkets produced? f(x) = –4(x – 50)(x – 250) f(x) = (x – 50)(x – 250) f(x) = 28(x + 50)(x + 250) f(x) = (x + 50)(x + 250)

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

Express -5 2/5 as an improper fraction.