The Ridgeport school district collected data about class size in the district. The table shows the class sizes for five
randomly selected kindergarten and seventh-grade
classes.
Number of students in
randomly
selected class
Mean Mean absolute
deviation
Kindergarten 18, 20. 21, 19, 22
20
1.2
27, 32, 33, 33, 35
32
2
Seventh
grade
Based on these data, which statement is true?
O A. Every seventh-grade class has 12 more students than a
kindergarten class.
B. The average size of a seventh-grade class is larger and varies
more than that of a kindergarten class.
C. The recommended number of students in a kindergarten class is
20.
OD. The average size of a seventh-grade class is larger but varies less
than that of a kindergarten class.

I'm not sure but i think it's 1670km/h

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )