Please help with question 7! BRAINLIEST to correct answer!

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Find the value of x. round the length to the nearest tenth