Five times the difference of a number and two is seven more than that number

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

The constitution gives congress the power to create federal courts lower than the supreme court higher than the supreme court equal to the supreme court, unaffected by the supreme court.

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*