Which system of equations below has exactly one solution? O y=-8x -6 andy= -8x + 6
Oy=-8x-6 and 5y=4x-3
Oy=-8x-6 and y = 8x-6
1
Oy=-8x-6 andy = 8x + 6

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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 =

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?