What is the weight of 12 boxes of oranges

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

What are the sotions to the quadratic equation 9x^2=4

What point is the projection of q on a) r b) s c) t