Find the greatest common factor of 30a^4 and 35a^5

Answer this question! 30 points and brainliest! only if you know the answer.

Factor the monomial completely 42a3b3

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3