We are to select 2 people to sit in first row from 6.
This is a problem of Combinations. We are find permutation of 6 people taken 2 at a time. This can be represented as 6C2.
So, the answer is option B
<h3>
Answer: Choice D. </h3>
Morgan forgot to distribute the negative sign to two of the terms in the second expression.
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Explanation:
Focus on the numerators.
We have (3t^2-4t+1) as the first numerator and we subtract off (t^2+2t+2) as the second numerator.
Morgan needs to simplify (3t^2-4t+1)-(t^2+2t+2) for the numerator.
Mistakenly, she had these steps
(3t^2-4t+1)-(t^2+2t+2)
3t^2-4t+1-t^2+2t+2 .... her mistake made here
(3t^2-t^2)+(-4t+2t)+(1+2)
2t^2-2t+3
All of this applies to the numerator. The denominator stays at t+3 the entire time. So effectively we can ignore it on a temporary basis.
Here's what Morgan should have for her steps when simplifying the numerator.
(3t^2-4t+1)-(t^2+2t+2)
3t^2-4t+1-t^2-2t-2 ..... distribute the negative
(3t^2-t^2)+(-4t-2t)+(1-2)
2t^2-6t-1
Note in the second step, the negative outside flips the sign of each term in the second parenthesis.
Therefore,

which means 
Side notes:
- The fractions can only be subtracted since the denominators are the same.
- We have
to avoid a division by zero error. - Rational expressions are a fraction, or ratio, of two polynomials.
Answer:
Below.
Step-by-step explanation:
1/6x^3 = -36
Multiply both sides by 6:
x^3 = -216
x = ∛(-216)
= -6.
c = pi times d so that would mean d divided by pi would be the diameter.
to find the radius you would then have to take the diameter and times it by 1/2 bc r = 1/2 times d
i hope this helps