18. The end behavior for a function that is represented by the equation f(x) = -2x4+ 3x3 - X - 5 is:

The solution set for 5v2 – 125 = 0 is

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

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.!