Free point have a nice day​

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

What is the solution of log2  (3x  -  7)  =  3? 4 5

If g^-1(x) is the inverse of g (x) which statement must be true