A city council consists of five Democrats and eight Republicans. If a committee of four people is selected, find the probability of selecting two Democrats and two Republicans.

What is the distance between (–2 1/2,-3) and (1, –3)?

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.