Let f(x) = 8x - 7 what is f(4)

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

(05.03 mc) part a: explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−2 intersect are the solutions of the equation 4x = 2x−2. (4 points) part b: make tables to find the solution to 4x = 2x−2. take the integer values of x between −3 and 3. (4 points) part c: how can you solve the equation 4x = 2x−2 graphically? (2 points)

Rationalize the denominator- 12x/√x-10