Which of these is a simplified form of the equation 7x + 4 = 5 + 3x + 1x? I really need the step by step so I know how to this. Thank y'all soo much <3

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

What is the gcf of 20c^3-5c^4+30c^6