A bird drops a stick to the ground from a height of 80 feet. The equation 0 = -16^2 + 64x + 80 gives the number of seconds that have passed when it hits the ground. After about how many seconds did the stick hit the ground?

Equation for the calculation double 2 and then add 5

(05.02)a farmer has decided to divide his land area in half in order to plant soy and corn. calculate the area of the entire area so he knows how much soil is needed. a parallelogram with a height of 6 yards and side length 9 yards. the height forms a triangle with the slanted side of the rhombus with a base of 2.5 yards. rhombus is split into a soy half and a corn half. each bag of soil covers 40 square yards. how many bags should the farmer purchase?

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?