Answer:
40+10=50
40+-15=25
40+-30=10
40+-40=0
40+-50=-10
20+-25=-5
Step-by-step explanation:
in this order
Answer:
b. 224
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
So it is z with a pvalue of 
, so 
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
In this problem:
We want to find n, when 
So
The nearest integer number to 223.9 is 224.
So the correct answer is:
b. 224
1/2 is another word for .5 or 50 percent. But if you Multiply 1/2 by 2, you multiply and you'll get 2/2 which reduces down to 1.
The statements can be used to describe the original functions f(x) and g(x) are; Option B
<h3>How to interpret function graphs?</h3>
Let the functions be
f(x) = ax + b
g(x) = cx + d
Their sum is;
j(x) = (a + c)x + b + d
Their product is;
k(x) = (ax + b)(cx + d)
From the graph, we see that;
f(x) = x + 6
g(x) = -2x² + 8
f'(x) = 1
g'(x) = -4x
Read more about Function Graphs at; brainly.com/question/4025726
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Answer: the sum is always positive
