What is the inverse of the function below? 2x +6

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Multiply. write your answer in simplest form. 3/8 x 5/7

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.