Jenny traveled to the recycling plant and back. It took one hour longer to go there than it did to come back. The average speed on the trip there was 64 km/h. The average speed on the way back was 80 km/h. How many hours did the trip there take? A) 4 hours B) 2 hours
C) 5 hours D) 3 hours

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Find the product of (4x + 3y)(4x − 3y). 16x2 − 24xy + 9y2 16x2 − 9y2 16x2 + 24xy + 9y2 16x2 + 9y2

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =