If the standard deviation of the data values in a sample is 19, what is the variance of the data values?

A mixture weighing 600kg has two ingredients: sand, cement and stones. There is twice as much cement as sand and three times as much stones as sand. How much cement in the mixture?

M&M plain candies come in various colors. According to the M&M/Mars Department of Consumer Affairs, the distribution of colors for plain M&M candies is as follows.

The product of 110 and h, plus 115 equals 63

It takes 3/5 feet of ribbon to make a pin. You have 9 feet of ribbon. How many pins can you make?

8=0.8 is it the answer 10

Pat and Julie share some money in the ratio 2 : 5 Julie gets £45 more than Pat. How much money did Pat get?

Two thirds of a number reduced by 11 is equal to 4 more than the number. Find the number

Describe when to use a series and when to use an equation. For example, when would you use: f (x) = 3x+5 and when would you use: Height = 2 + 3n (where n is 1, 2, 3 ...)

Round 593,204 to the nearest ten thousand

The measure of an angle and the measure of its supplement are equal. find the measure of each of the supplementary angles