If twenty people met at a party and all shook hands with one another, how many handshakes would there be?

A sequence is defined recursively by the formula F (n+1) = -2f (n). The 1st term of the sequence is - 1.5. What is the next term in the sequence

If sally got 28 questions correct and received 70% on the exam, how many questions were on the exam

Mary has a pink dress, a blue dress, and a yellow dress. She has a black pair of shoes and a white pair. How many dress and shoe outfits can she make?

Write an equation in slope intercept form of the line satisfying the following conditions through (5,9) perpendicular to x=4

The large bottle of nasal spray is 9.46 centimeters tall. The small bottle is 5.29 centimeters tall. How much shorter is the small bottle than the large bottle?

7) Ryan's school is selling tickets to a play. On the first day of ticket sales the school sold 8 senior citizen tickets and 10 student tickets for a total of $182.

Increase 260kg by 10% and then decrease the result by 10%

The perimeter of a rectangle is 354 CM if the width of the rectangle is 82 centimeters what is its length

In a popular casino game, you can bet one whether a ball will fall in an arc on a wheel colored red, black, or green.

The ends of the base of an isoceles triangle are (2a, 0) and (0, a). the equation of one ide is x=2a. find the eqns of the base, the remaining sides and the coordinates of the vertex.