There are 110 people at a meeting. They each shake hands with everyone else. How many handshakes were there?

A) Permutation

B) Combination

C) Circular permutation

If a security pays $55 in one year and $133 in three years, its present value is $150 if the interest rate is

Choose a method. Then find product. 10*12

Solve the equation 2/3-4x+7/2=-9x+5/6

Theoretical probability of landing when spinning a spinner with 4 equal spaces marked 1, 4, 6, 8

Which person is heavier: 75 kg or 110 lb?

Are all diagonals also lines of symmetry? And can you explain why?

The neighborhood census shows that the 10 families in the neighborhood have 2, 4, 3, 2, 2, 1, 3, 4, 1, and 5 children. What would happen to the mean number of children in a family if a family with 4 children were added to the census?

How many water glasses are in a 17oz bottle?

The wheels of a car lock up and it skids 15 m. If it goes 3 times the speed it was going on the same road and under the same conditions, how far will it skid if it's wheels lock up again? A. 26 m b. 45 m c. 90 m d. none of the above

An observer in a lighthouse 350 ft above sea level observes two ships directly offshore. The angle to the shore are 4 and 6.5 degrees.