Simon veut laver les fenêtres extérieures du 2 étage de sa maison . Les fenêtres sont situées & une hauteur de 8,5 m . Si le pied de l'échelle est m du mur, quelle est la longueur minimale de l'échelle ?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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 =

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.