You need to show us the pictures of the graph I think
Step-by-step explanation:
So what you can do is first get ride of the parentheses around 5-m so:
Then, you can simplify the numbers inside the parentheses, so:
Then, you can get rid of the parentheses by distributing the - sign:
Next, just combine like terms:
or 
Number 22 is 78.5 and number 26 is 4,o69
Answer:
c. is computed by summing all the data values and dividing the sum by the number of items.
Step-by-step explanation:
Mean is said to be the average of the entire data set. Even in case when data set is too large we choose to calculate the mean of sample. In that case, sum up all the data of sample and divide by the number of items.
For example:
There are 50 students in the class, but some students are not present, some are not in the class, to collect information from all students is not feasible, in that case.
The data of some random 10 students is taken, example to check the proficiency in mathematics their scores in last class test are summed up, and divided by number of students considered.
That is sum of marks obtained by 10 students divided by 10, will provide the mean.
