Cómo se desarrollan las 5 fórmulas básicas?

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

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.!

The measure of angle theta is 3 pi over 2. the measure of its reference angle is pi /