What is the property for 21 + (8+3) = (21+8) + 3

How can I assess the accuracy of my line of best fit?

Solve the equation using square roots 3x^2-48=0

What is the interquartile range of the data? With the numbers 2,3,3,4,5,7,8,8,8,10,10, and 12

Five times the sum of a number and three is the same as three times the difference of twice a number and one what is the number

X > 2 and x < 7 I don't understand

Cups are sold 8 a package and plates are sold 12 to a package. If you want to have the same number of each item for the party, how many of each do you need to buy? what is the least number of packages of each you need to buy?

What is the formula for the sum of an infinite geometric series

Denise put $95 into an account that pays 5.2% interest, compounded monthly. According to the rule of 72, approximately how long will it take for her money to double?

What is the percent change between 20% and 30%

What is the recursive rule for this geometric sequence? 3, 3/2, 3/4, 3/8