Challenger Elementary School has 800 students. Every Wednesday, 12% of the students stay after school for
Chess Club.
How many students attend Chess Club on Wednesdays?

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

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 =

Which expression shows the sum of the polynomials with like terms grouped together