Help me solve this!Merçi!​

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

Candice uses the function f(t)=t+100−−−−−−√ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days