Consider the arithmetic series 
Let t=1 in the given series, we get
first term =
= 3-4 = -1.
Let t=2 in the given series, we get
second term =
= 
Let t=3 in the given series, we get
third term = 
Now, let t=18 in the given series, we get
last term = l = 
We get the series as
-1, 2, 5,..... 50
Sum = 
= 
= 
= 441
Therefore, the sum of the given arithmetic series is 441.
Answer:
C. x + (x – 6) = 188
Step-by-step explanation:
if x represent Monica's score
then the score of Diego is x - 6
therefore
Monica's score + Diego`s score = 188
means
x + (x - 6) = 188
The best and most correct answer among the choices provided by your question is the first choice or letter A. The<span> systems of equations can be used to calculate the number of large and small buttons sold are:
</span>
<span>x + y = 21
3x + 4y = 68</span>
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