The probability distribution of a random variable x is given below. x 1 2 5 8 9 p(x = x) 1⁄7 9⁄35 1⁄5 2⁄7 4⁄35 given the mean exam image find the variance (var(x)) and the standard deviation, respectively.\

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

Find the rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.