-5 plus -3 is -8. If that is what your question is asking, that is your answer.
Say there is a rectangular garden and a wall needs to be raised on all sides of it. How long should the wall be? The answer is that it needs to be as long as the perimeter of the rectangular garden. If one side of the garden is 5 feet and the other is 10 feet, what is its perimeter? The answer is simply 5 5 x 10 = 50 feet.
So one would need to build a 50-feet wall in order to completely surround the garden.
Answer:
the population means are known the population variances are assumed equal but unknown
Step-by-step explanation:
If σ1= σ2 (= σ) but unknown , then the biased pooled or combined estimate of the common variance σ² ( the term common variance means that each population has the same variance ) is given by
Sp²= (n1-1) s1² + (n2-1) s2²/ n1+ n2- 2
So first assumption is correct.
When the population variances are assumed unequal and unknown
If σ1 ≠ σ2 but unknown
we use the sample estimates s1 and s2 to compute the standard error of the difference between the means.
S(x1`- x2`) = √s1²/ n1 + s2²/n2
So this is does not apply here.
The questions asking here is basically asking for half of the hypotenuse
Pythagorean Theorem= a^2 + b^2 = c^2
40^2 + 30^2 = c^2
1600 + 900 = c^2
2500 = c^2
square root of 2500 is 50
C = 50
half of C is 25
BE is 25
Answer:
12.5%
Step-by-step explanation:
To find what percent of 120 15 is, we must find what 15/120 is.
15/120 = 0.125. To convert to a percent, we move the decimal two places to the right. So, the answer is 12.5%.
Brainliest, please :)