Which method is best used for each system? column A
1. -4+3y=12, 4x-4y=-12
2. y=4x+12, 4x-4y=-12
3. y=4x+12, y=-x+3

column B
a. substitution method
b. graphic method
c. elimination method

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Standard deviation of 19,29,21,22,23

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean