Pls...I have no idea what the answer is :(

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!

What is perpendicular to y=-1/2x+11