Which expression shows the increase in average temperature, t, from February to March?
A 27 – t = 37
B 27 + t = 37
C 27t = 37
D 37 ÷ t = 27

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 first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?