If the bucket was 4/5 full at the beginning of the day and 1/5 full at the end of the day, by what fraction of the bucket did the water level decrease?

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

"which statement is necessarily true if bd is an altitude to the hypotenuse of right ? abc? a.) ? adb? ? bdc b.) ? adb~? bdc c.) abbc=acbd d.) ? bac? ? bdc"

Which equation can be simplified to find the inverse of y = 2x2^2