Explain the process for determining sales tax and total purchase price.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

What percent of 18 is 24? and plz explain thx.

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.!