10 children attended a party, if all the children shake hands with each other, how many handshakes were at the party?

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 is equivalent to 3^3 + 2^2?

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl