What is the simplified form of the following expression?
7({/2x) - 3/163)-3(18x)
5
3/27 -6(%)
-(2/2x)-6(V)

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16