I drove to the beach at a rate of $40$ miles per hour. If I had driven at a rate of $30$ miles per hour instead, then I would have arrived $20$ minutes later. How many miles did I drive?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?

Out of five men and five women, we form a committee consisting of four different people. assuming that each committee of size four is equally likely, find the probabilities of the following events: 1. the committee consists of two men and two women 2. the committee has more women than men. 3. the committee has at least one man. for the remainder of the problem assume that alice and bob are among the ten people being considered. 4. both alice and bob are members of the committee.