Formulas: s. = (a +Q) S, =0(1) So - a
Show all work. Give exact answers. Express answers in simplest form. (4 pts each)
1. Use a formula to find the 6th term of the geometric sequence: 11, -44, 176, ...
2. Find the first four terms of the sequense with nth term, an = 2n + 1
3. Use a formula to find the sum of the first 12 terms of the arithmetic series:
-11 - 3+5+ ...

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

y=mx+

the answer to the expression is 83