N(p)=4 means that there a four elements in a set P. Given: n(X u Y)=50
n(X)=20
and n(Y)=40.
Determine n(X n Y)

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.

Which equation represents the model shown? a)1/3 divide 1/6 = 2 b)2/3 divide 1/6 = 2/18 c)1/3 divide 1/6 = 1/18 d)2/3 divide 1/6 =4

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )