How do I solve this problem and show my work? A group of 71 friends meet for lunch. They greet each other by exchanging first bumps. How many fist bumps are exchanged if each friend must bump with each of the 70 others?

Y=-2x+11 what is the slope of the equation?

Y = 8x + 168 show your work

In the data set below, what is the upper quartile? 3344466889

Number sequence of 2,7,8,3,12,9,

Parker needs cardboard to complete a project for school. He is looking for pieces that are 3 1/2 feet long. He discovered that he would need 8 pieces to complete the project.

What is the additive inverse of the polynomial 9xy^2 + 6x^2y - 5x^3? A. 9xy2 - 6x2y + 5x3 B. 9xy2 - 6x2y - 5x3 C. 9xy2 + 6x2y + 5x3 D. 9xy2 - 6x2y + 5x3

If you invested $500 at 5% simple interest for 2 years, how much interest do you earn? Show work and answer in complete sentences to earn full credit.

Sale amount 1250.00 and 6.5% sales tax

The total distance an object travels varies directly with the length of time it travels. If an object travels 24 meters in 9 seconds, how long will it take to travel 96 meters? A. 32 seconds B. 36 seconds C. 40 seconds D. 42 seconds

A polling organizations wants to sample the opinions of low-, medium-, and high-income people. Which sampling strategy is best suited for this purpose? A. convenience B. simple random C. stratified random D. systematic