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

Write a proof to show that opposite angles of a parallelogram are congruent. Be sure to create and name the appropriate geometric figures. This figure does not need to be submitted.

the sum of ava's and grace's ages is 35. Ava is one year less than three time Grace's age. How old is Ava, x and Grace, y express your answer as an ordered pair

The expression 12a+7s is the cost in dollars for A adults and S students to enter the local marching band competition. Find the total cost for four adults and 30 students

people dis aint a question. but imma tell ya somethin - im here to cheat on my homework xD anyone else?

Emily Anderson's deposit includes two checks; $231.09 and $987.67; cash 9 one-dollar bills, 9 five-dollar bills, 8 ten-dollar bills, 14 quarters, 25 dimes, 18 nickels, and 64 pennies. She received $40 cash from the total amount.

Which measurement statement is correct? A. There are 2 cups in a pint B. There are pints in a cup C. There are 4 quarts in a pint D. There are 4 pints in quart

What is the surface are of a storage b

Matthew has 30 stamps in his collection. Matthew's father has 10 times as many stamps as Matthew. How many stamps does Matthews father have?

Y=1/2x - 2 and y=-3x+5 solve this system by substitution

Evaluate the function g (t) = 3/2t - 5/2, when t = 5