Which of the following has no solution? (x + 1 ≤ 1) ∩ (x + 1 ≥ 1)
(x + 1 < 1) ∩ (x + 1 > 1)
(x + 1 < -1) ∩ (x + 1 < 1)

Simplify the expression. enter the correct answer.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

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 =