Answer:
I believe this is pathgorean theorem, which I did at the beginning of alegbra last year. It is basically finding the missing side of a triangle. (Trust me some of the easiest stuff you do all year) Below are my notes from last year. I hope it helps! Good Luck!!!
Step-by-step explanation:
Given two sides
If you know two other sides of the right triangle, it's the easiest option; all you need to do is apply the Pythagorean theorem:
a² + b² = c²
if leg a is the missing side, then transform the equation to the form when a is on one side, and take a square root:
a = √(c² - b²)
if leg b is unknown, then
b = √(c² - a²)
for hypotenuse c missing, the formula is
c = √(a² + b²)
Answer:
1
Step-by-step explanation:
x*4+7-3=8
4x+7-3=8
4x+4=8
4x=4
x=1
If exactly as written
-16128x^2y
if x^4 x^3 and y^2
-672x^7y^2
No
yes
yes
yes
no
yes
yes
no
Answer: 0.0084
Step-by-step explanation:
Let p be the population proportion of the creatures in Wonderland are anthropomorphic animals.
As per given, p = 0.70
Sample size : n=120
Let 
be the sample proportion of the creatures are anthropomorphic animals.
Now, required probability :
![P(\hat{p}>0.80)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}>\dfrac{0.80-0.70}{\sqrt{\dfrac{0.70\times (1-0.70)}{120}}})\\\\P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}>\dfrac{0.10}{\sqrt{\dfrac{0.70\times 30}{120}}})\\\\ =P(Z>\dfrac{0.10}{\sqrt{0.00175}})\ \ \ \ \ [Z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}]\\\\ =P(Z>\dfrac{0.10}{0.04183})\\\\\=P(Z>2.39)\\\\=1-P(Z\leq2.39)\\\\=1- 0.9916= 0.0084](https://tex.z-dn.net/?f=P%28%5Chat%7Bp%7D%3E0.80%29%3DP%28%5Cdfrac%7B%5Chat%7Bp%7D-p%7D%7B%5Csqrt%7B%5Cdfrac%7Bp%281-p%29%7D%7Bn%7D%7D%7D%3E%5Cdfrac%7B0.80-0.70%7D%7B%5Csqrt%7B%5Cdfrac%7B0.70%5Ctimes%20%281-0.70%29%7D%7B120%7D%7D%7D%29%5C%5C%5C%5CP%28%5Cdfrac%7B%5Chat%7Bp%7D-p%7D%7B%5Csqrt%7B%5Cdfrac%7Bp%281-p%29%7D%7Bn%7D%7D%7D%3E%5Cdfrac%7B0.10%7D%7B%5Csqrt%7B%5Cdfrac%7B0.70%5Ctimes%2030%7D%7B120%7D%7D%7D%29%5C%5C%5C%5C%20%3DP%28Z%3E%5Cdfrac%7B0.10%7D%7B%5Csqrt%7B0.00175%7D%7D%29%5C%20%5C%20%5C%20%5C%20%5C%20%5BZ%3D%5Cdfrac%7B%5Chat%7Bp%7D-p%7D%7B%5Csqrt%7B%5Cdfrac%7Bp%281-p%29%7D%7Bn%7D%7D%7D%5D%5C%5C%5C%5C%20%3DP%28Z%3E%5Cdfrac%7B0.10%7D%7B0.04183%7D%29%5C%5C%5C%5C%5C%3DP%28Z%3E2.39%29%5C%5C%5C%5C%3D1-P%28Z%5Cleq2.39%29%5C%5C%5C%5C%3D1-%200.9916%3D%200.0084)
Hence, the probability that more than 80% of the sampled inhabitants are animals= 0.0084
