Elijah spends $15 on 3 t-shirts How much is 1 shirt

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Can someone answer this question for me

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.!