2 years ago

Consider the equation |1/4+12|=x/2.Without calculating, how do you know x=-16 is an extraneous solution?

1 answer:

5 0

Without calculating, you can immediately see the absolute value sign, which implies that the final result (x) should be positive, not negative.

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Answer:

165 combinations possible

Step-by-step explanation:

This is a combination problem as opposed to a permutation, because the order in which we fill these positions is not important. We are merely looking for how many ways each of these 11 people can be rearranged and matched up with different candidates, each in a different position each time. The formula can be filled in as follows:

₁₁C₃ = $\frac{11!}{3!(11-3)!}$

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₁₁C₃ = $\frac{990}{6}$

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2 years ago