2. Simplify these expressions
a 6ab + (-3x) + 2ab
b. 12x + 4y + (-3x)
c 6w + (-2y) + 3w
d 4abc + (-9abc) + 10d

Arectangular prism is 3 meters long, 6 meters wide, and has a height of 9 meters. what is its surface area?

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?