10 is proportional, while 11 is not. The answer for 10 is 1.5.
When finding slope the answer is always going to be rise/run so in this case,
#1 would be 1/2 (bc it goes up one and right 2)
#2 we have a rise of 3 and a run of 3 leaving our slope to be 3/3 simplified simply being 1
another trick you could use is dividing the denominator by the numerator
Answer:
<em></em>
<em></em>
<em></em>
Step-by-step explanation:
Given

Required
The standard deviation
First, calculate the expected value E(x)

So, we have:


Next, calculate E(x^2)

So, we have:


The standard deviation is:




<em></em>
<em> --- approximated</em>
The answer would be 12 feet square.
That’s because taking out the square is taking out an area of 4 feet square. If you substitute the 4 feet square back in, that would fill in the empty spot marked with the 2 feet by 2 feet dimensions. Then, you could treat it like a rectangle of 4 by 3. If you multiply them you’ll get 12 feet square which is your answer. Hope this helps
Answer:
a. p(x<= 5) = .15 + .4 + .25 = .8
C. .4(4.2) = 1.68
5.4(1-.4) = 3.24
3.24 + 1.68 = 4.92 ,, 4.92 > 4.55 so short is better
Step-by-step explanation: