Is a triangle with side lengths of 7cm, 24cm, and 25cm a right triangle?explain

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.

Can someone me with this? i’m not sure what to put for my equations.

What expression is equivalent to (84+16)