Sally classified a triangle as an obtuse acute triangle is this a possible classification expain

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Give the functions f(x) = |x + 2| - 3, what is the domain? a, b,c, or d all real numbers x > 2 x < -2 all real numbers and x cannot equal to 2

Find the power set of each of these sets, where a and b are distinct elements. a) {a} b) {a, b} c) {1, 2, 3, 4} show steps