In a huge chess tournament, 66 games were played. Find out how many people were involved if it is known that each participant played one game with every other participant in the tournament.

Using the formula P = 2 (a + b), find a when P = 15 and b = 5. 1) 2.5 2) 5 3) 8 4) 10

Jacob is choosing a cell phone plan. If five messages cost $1 and 20 messages cost $4, what is the rate of change of the cost per message? -$2 per message $2 per message -$0.20 per message $0.20 per message

The half-life of Sodium-24 is 15 hours. If you start with 600 grams of sodium-24 how much would be left after 4 days? Which of the following equations could you use to solve for the amount of grams left after 4 days?

The scatter plot below shows the number of pages scanned (y) in different number of hours (x) by a scanning machine: plot ordered pairs 0, 500 and 1, 1500 and 2, 2500 and 3, 3500 and 4, 4500 and 5, 5500 which function best represents the data shown

Tony's Baby-sitting service charges $8.50 per job plus $6.75 per hour. What is the cost of a 7-hour baby-sitting job?

If f (x) = x-5 and g (x) = x^2 what is g (f (-3))

What is - 2 (x+3) = 4x-3

Sarah had (x) dollars. Rachel had four times as much as Sarah. Addie had 10 dollars less than Sarah. How much money did they have altogether?

What property is 3x (2x6) = (3x2) x6

Express the given sets in notations: The set consisting of the elements 0, - 1, - 4, - 3?