There are 5 people at a party each person must shake hands once with every other person at the party how many handshakes dose it take to do this?

When a formula is solved for a particular variable, several different equivalent forms may be possible. if we solved a=1/2bh for h, one possible correct answer is h=2a/b . which one of the following is not equivalent to this? a. h= 2(a/b) b. h= 2a(1/b) c. h= a/1/2b d. h= 1/2a/b

A50% increase followed by 33 1/2% decrease

What is always true when two whole numbers are subtracted?