Six people come to a party and shake hands with each other. If each person shakes the hand of every other person, how many handshakes occur

Solve this system of linear equations. Separate the x - and y-values with a comma. 13x = - 21 - 2y - 15x = 23 + 2y

A hexagon forms a semi-regular tessellation with which of the following regular polygons?

Which of the following is a rational number, √1 √2 √3 √5

The probability David is early to school is 0.1 and he is late 4 out of 10 times. What is the probability he is on time?

Slope of a line that contains j (1,-4) k (3,-1)

I am a decimal If you double me, my double is between 0.6 and 0.7 My thousandths digit is not a 2, but the thousandths digit of my double is, What decimal might I be

The sum of the angles in a triangle equal 180°. ABC is a triangle. Angle A is > 90°. Using deductive reasoning, what can we conclude?

Admission to a baseball game is $5.00 for general admission and $7.00 for reserved seats. The receipts were $6192.00 for 1136 paid admissions. How many of each ticket were sold?

How can we quickly order data and, at the same time, reveal the distribution shape?

Recursive rule and a explicit rule for 42,53,64,75,86