Simplify the following expression:
7y + 2x – 10y + 3x2 - 10x
+
o 3x2 - 8x - 3y
o 3x2 – 8x - 17y
3x2 + 8x – 3y
3x2 - 12x + 3y
i need with this math

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 =

Equation for the calculation double 2 and then add 5

How many ordered pairs of positive integers satisfy xy=32?