F(x)=x+3 vertical stretch by a factor of 4

Which expression is equivalent to the expression shown?

Select the correct answer from each drop-down menu. the length of a rectangle is 5 inches more than its width. the area of the rectangle is 50 square inches. the quadratic equation that represents this situation is the length of the rectangle is inches.

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.