Please help ASAP What is the length of BC?

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

Empty box + box + empty box fill in the box is equal to 30 how

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2