Factor the numerator and denominator...

(n^4-5n^2-6n^2+30)/(n^4-2n^2-5n^2+10)

[n^2(n^2-5)-6(n^2-5)]/[n^2(n^2-2)-5(n^2-2)]

[(n^2-5)(n^2-6)]/[(n^2-5)(n^2-2)] notice the (n^2-5)s cancel out

(n^2-6)/(n^2-2)

We could further factor this because each is a difference of squares to:

[(n+√6)(n-√6)]/[(n+√2)(n-√2)

8 0

3 years ago

Random cell phone calls sent out to a sample size of 850 people is what type of sampling method? (I.e. simple random, etc.)?

ryzh [129]

Answer: Simple Random Sampling (SRS)

The people chosen are basically picked out of a hat at random, though likely they are chosen by a computer.

5 0

3 years ago

-|3n| - 2 = 4 <br><br> a. -8 b. -2 c. 3 d. -3

Ber [7]

Answer:

-2