Pls help asap I need help need to get done in 1 hour and 30 minutes

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.