Consider the weights in kilograms of a group of teen agers. If the standard deviation is 8.7 kg, what is the variance?

What is 2/3 over 4/-9=

Jasmine finished the bike trail in 2.5 hours at an average rate of 9 3/10 miles per hour. Lucy biked the same trail at a rate of 6 1/5 miles per hour. How long did it take Lucy to bike the trail?

The perimeter of a rectangular house is 122fr the width is 5ft less than the length find the length and width

What is the numerical coefficient of the term 12x

The swiger family recycles about 15 pound of waste a week this is 2 over 5 of the total waste for the week. how many pounds of waste does the family produce each week?

Show work? |5x+10|=-7

Meg lives in Indianapolis and wants to visit her mom in Lima. She has been meaning to go to a chiropractor in Dayton, so she is wondering whether it makes sense to stop there on the way.

An advertisement states that a can of paint will cover 480 square feet. How many gallons of paint are needed to cover 1,680 square feet?

Mrs McDonald spent 24.65 at a yard sale on Saturday. on Sunday she went to another sales and spent 14.95 more than she did on Saturday. what is the total amount that Mrs McDonald spent on both yard sales

Linda purchase a prepaid phone card for $30. Long distance calls cost $.17 a minute using this card when do use her card. Linda use her card only to make a long distance call if the remaining credit on her card is $22.