An ore is 0.75% pure gold. how many kilograms of gold are in 500 kg of ore?

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]

What is another way to express 36 +32

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)