When the expression 5x(2x+5)-x^2+4x is simplified it is equivalent to?

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

For the right triangle shown, the lengths of two sides are given. find the third side. leave your answer in simplified, radical form.