What is the biggest difference between exponential functions and other functions you have learned about up to this point?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.

I’m really confused and need to learn this