The graph for the equation y=2x−2 If another equation is graphed so that the system has one solution, which equation could that be?

y=2x + 2
y=2x−2
y=2x−4
y=−2x−2

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

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.

How many 2/5s are in 1 and 1/2 plz someone me right now