For each of the triangles below, find the exact value of x.

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 someone me with this problem i don't understand i need

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m