HELP! i’ll mark brainleist

Which value of c would make he following expression completely factored? 8x+cy

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4