Factorise

400x^2-49y^2

The 6 participants in a weight-loss class lost the following weights (in pounds) after three weeks of dieting. 0,1, 6, 1,5,5 Assuming that these weights constitute an entire population, find the standard deviation of the population.

Each side of a cube is 3.1 cm long. Find the volume of the cube. a. 9.61 cm^3 b. 9.3 cm^3 c. 6.2 cm^3 d. 29.791cm^3

How to calculate the area of my feet

Find slop for 7x-2y=0.2

juanita wants to pay the least amount per bar of soap at the store. the soap juanita will buy comes in packages of four and six. which is the better buy juanita, six bars of soap or $1.70 or four bars of soap for &1.15?

A book has 180 pages. Hailey read 12 pages each day. After a certain number of days, there are 60 pages left.

9.88930605114 to the nearest ten thousandth

What is 95% closer to 85% or 100% when rounding?

What is 5 4/9 + 2 15/36 as a whole or mixed number?

Order of operations - usually, one egg is released each month during a female's reproductive years. If menstruation begins at 12 years of age and ends at 50 years of age, calculate the number of eggs her body can release during her reproductive