Part a: solve the equation 7x + 3x − 18 = 6(x + 3), and show your work. (5 points)
part b: use this list of properties to justify each step of your math work. justifications may be used more than once if needed.
distributive property
subtraction property of equality
combine like terms
multiplication property of equality
division property of equality
given addition property of equality
answer as well as you can

x = 9

step-by-step explanation:

7x + 3x − 18 = 6(x + 3)     given

10x − 18 = 6(x + 3)     combine like terms

10x − 18 = 6x + 18     distributive property

10x − 18 - 6x = 6x + 18 - 6x       subtraction property of equality

4x − 18 = 18     combine like terms

4x − 18 + 18 = 18 + 18       addition property of equality

4x = 36       combine like terms

x = 9       division property of equality

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.