A. The discriminant is 81. The formula is b^2 - 4ac.
B. 2 answer and both will be rational due to the fact that the discriminant is a perfect square.
C. Solutions are 1/2 and -4. You can find using the quadratic formula.
You would need exactly 9 correct questions to get a 50%.
We can find this by multiplying the total number of questions by the percentage we are looking for.
18*50% = 9
ANSWER
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EXPLANATION
The general term for the sequence is
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To find the 55th term, we have to substitute

in to the general term and simplify.
This implies that,
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


Therefore the 55th term is 161.
Answer:
= 5
Step-by-step explanation:
Substitute the given values into the formula
16 =
× 4(3 +
)
16 = 2(3 +
) ( divide both sides by 2 )
8 = 3 +
( subtract 3 from both sides )
5 =