What is the formula for standard deviation?
for quantitative literacy class.

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?