Answer:
10
Step-by-step explanation:
<u>A negative number with another negative sign is practically a positive number.
</u>
Example: -(-4)
-(-4)
-1 * -4
4
Question: -(-10)
-(-10)
-1 * -10
<em>10
</em>
Answer: 10
The confidence interval is given by the formula:
m +/- z·(σ/√n)
First, compute the mean:
m = (<span>15.8 + 15.6 + 15.1 + 15.2 + 15.1 + 15.5 + 15.9 + 15.5) / 8
= 15.463
Then, compute the standard deviation:
</span>σ = √[∑(v - m)²/n]
= 0.287
The z-score for a 95% confidence interval is z = 1.96.
Now you can calculate:
m + z·(σ/√n) = 15.463 + 1.96·(0.287/√8)
= 15.463 + 0.199
= 15.662
m - z·(σ/√n) = 15.463 - 1.96·(0.287/√8)
= 15.463 - 0.199
= 15.264
Therefore the confidence interval is (15.264, <span>15.662) and the correct answer is E) none of the above.</span>
Answer:
10x^2+14x-48
Step-by-step explanation:
5x*2x=10x^2
5x*6=30x
-8*2x=-16x
-8*6=48
combine them and you'll get 10x^2+14x-48
