What is the value of x if
4x - 9 = 11?
A. 1/2
B.2
C.5
D.20

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i