Add 3 standard deviations above and below the mean to get the range in which 99.7% of the data in a normal distribution will fall
6.5 + 4.5 = 11
6.5 - 4.5 = 2
So 2 to 11 ounces would be the interval
is the equation 2x(2)-2x-9=0??? If it is, then x=9/2, i think, sorry if my answer is wrong or I read your question incorrectly!
84 to 62. You have to subtract 146-84 to get the number of girls from the class.
The jeans are 35 each and she bought 4 of them
So the equation is 35(4) = c
140
The cost of 4 jeans are $140 dollars.
