Find the sample standard deviation and the population standard deviation of the data set. 42, 49, 22, 36, 62, 23, 54, 23, 24, 22,30, 23, 60, 49, 52

Ascatterplot is produced to compare the size of a school building to the number of students at that school who play an instrument. there are 12 data points, each representing a different school. the points are widely dispersed on the scatterplot without a pattern of grouping. which statement could be true

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)