Answer:
The answer is 85
Step-by-step explanation:
The equation used to find the sum of an arithmetic series is: (n/2) * (a1 + an).
n in this case is 10 (the number of numbers in the series)
an is 22 (plug in 10 to the expression 3n-8)
and a1 is -5 (plug in 1 to the expression 3n-8)
so when you plug everything in to the final equation, you get
(10/2) * (-5 + 22)
5 * 17
85
Answer:
so this one could be a little tricky to understand over the computer.Im going to try my best though.
Step-by-step explanation:
Its hard to explain how i got the answer.
im not going to try and do it.
7-5
8-2.5
really hope this helps. :)
Answer:
12
Step-by-step explanation:
Answer:
it is D
Step-by-step explanation:
Answer:
Step-by-step explanation:
you do y1-y2 +y1-y2
