For christmas, maryland purchased a subscription to xbox live. it costs $5 per month plus a $15 sign-up fee. if she received a bill for $120,for how many months did she purchase subscription for her children

The question is an illustration of linear equations.

The number of months she purchased is 21 months

From the question, we have:

per month

Let the number of months be x.

So, the bill is calculated using:

Substitute known values

Subtract 15 from both sides

Divide both sides by 5

Rewrite as:

Hence, she purchased 21 months subscriptions

Read more about linear equations at:

link

Make an equation: 15 + 5m = 120, where 15 is the sign up fee, 5m represents 5 dollars per month, and 120 represents the total amount spent.

Solve for m, months, to find how many months Maryland purchased subscription for her children.

Subtract 15 from both sides.

5m = 105

Divide both sides by 5.

m = 21

Maryland purchased subscription for 21 months.

a

explanation:

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.