9d+2d+3d-4=5d
a- 4/9
b- -2
c- -4/3
d- 4/19

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

The sum of two numbers is 12 and their difference is 18 what are the two numbers

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?