Suppose there are 15 people in a room. each of those 15 shakes hands exactly once with everyone else. how many handshakes take place?

A box of 500 business card cost $19.95

Solve for x. Use the quadratic formula to solve for x. X^2+10x=6

Sarai is making a square pillow with edges that are each measure 18 inches long. she needs a strip of fabric 4 times as long as one edge of the pillow to make a border around the pillow. how long does the strip of fabric need to be?

The product of two positive numbers is greater than the sum of the two numbers.

Is 7 (x+2y) the equivalent of 14x + 14y

A group of bike riders took a 4.0 hour trip. during the first 3.0 hours, they traveled a total of 50. kilometers, but during the last hour, they traveled only 10. kilometers. what was the group's average speed for the entire trip?

The product of a number and negative 16 is 64

Mark and his brother signed up for the Catch Up phone plan. They share the minutes every month equally. How many minutes can Mark use each day without going over his share of minutes?

Choose the converse of the following statement. They are not left behind, if they are on time. If they are not left behind, then they are on time. If they are on time, then they are not left behind. If they are not on time, then they are left behind.

An airplane flies 105 miles in ½ hour. How far can it fly in 1 ¼ hours at the same rate of speed?