One number is 9 more than twice another number. if the sum of the numbers is 129 find both numbers

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 =

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

How do you write y-10=2 (x-8) in standard form