Find the sum of the first 21 terms of the arithmetic sequence 5, -2, -9.
2 answers:
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Answer:
Option B
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
In this problem the only linear function that passes through the origin is
where
The constant of proportionality is k=3/4
Answer: B.x(0.75)
Step-by-step explanation:
If the jacket has a cost of , but has
off and we have to add the
in tax, we can write all in the following expression:
Where:
is the cost
is the percent off
is the tax
Then:
This can be also rewritten as:
Hence, the correct option is B.