Which of these expressions requires a variable? A
the expression for how much money Abe earns when he makes $15 an hour and works for three hours

B
the expression for the number of pencils Cody has if he starts with nine pencils and then gives four to Molly

C
the expression for the total number of cakes when Cindy brings one cake to class, and Bryan brings two cakes to class

D
the expression for how many birthday parties Pia has this June if she has one more birthday party than her brother

see below

step-by-step explanation:

7.   there are 10 data points in the set.   the middle point is between 5 and 6.   the middle point in the top half is 8   and the middle point in the bottom half is 3. to find the iqr , take point 8 and subtract point 3

mid term   point 8 = 100   point 3 = 88

iqr = 100-88 = 12

final   point 8 = 93   point 3 = 78

iqr = 93 - 78 = 15

the final has the greatest iqr

6.   b - there is a high data value that causes the data set to be asymmetrical for the males: the data for males are high and asymmetrical .   there is an outlier for the males that skews the data

5.   the   iqr is a better measure of spread for the movies and basketball games.   since the basketball game has an outlier, we do not want to use standard deviation for measurement.  

3.   the exam median is much higher than the class median.   the median line is farther to the right on the exams

2.   there is no way to tell what the means are from the box and whisker plots.  

x coordinate is none

step-by-step explanation: