Atest consists of 10 a. true b. false questions. to pass the test a student must answer at least 7 questions correctly

Can someone pls ! pls answer all. no explanation needed..

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?