If ab is parallel to cd, which statement must be true

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?