How many stars will be in the 5th figure

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.