Well its pretty obvious that it cant be A the answer will be E) because abc are connected and abd are as well so the answer will be e
<h3>Answer for problem 7 is B) Kelly</h3>
Since she has the most heads come up, making her chances to be best of getting heads.
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<h3>Answer for problem 8 is D) Jessica</h3>
Divide each of the four values (102, 164, 75, 139) by 250 to get
102/250 = 0.408
164/250 = 0.656
75/250 = 0.300
139/250 = 0.556
We see that Jessica's empirical probability of 0.556 is closest to that of 1/2 = 0.500 which is the theoretical probability of getting heads.
Comment
There are 4 terms in this series
That's because the summation (Sigma) goes from 3 to 6 inclusive. So k takes on values of 3,4,5,6
You could use this summation formula
Formula
Sum = (a + L)n/2
Substitution
a is the first term.
k = 3 for the first term
a = -5k + 20
a = -5(3) + 20
a = -15 + 20
a = 5
For the last term k = 6
L = -5(6) + 20
L = -30 + 20
L = - 10
Sum
Sum = (5 - 10)*4/2
Sum = -5 * 2
Sum = -10
Comment
You may wonder how come the last term and the sum are the same. The reason to be found by figuring out the 4 terms and adding them together.
When k = 3, -5k + 20 = -15 + 20 = 5
When k = 4, -5k + 20 = -20 + 20 = 0
When k = 5, -5k + 20 = -25 + 20 = -5
When k = 6, -5k + 20 = -30 + 20 = -10
Sum = 5 + 0 - 5 - 10 = - 10
Conclusion.
It is an accident of the numbers.
Answer: - 10 = the Sum
Answer:
B. Time(length)
Step-by-step explanation:
The function that would be represented as a good name for a function for the length of the race and the return the time required to finished it
here the independent variable or the INPUT is the length while the output would be the time that required to finish it
Hence, the correct option is B,
Therefore all the other options would be incorrect
Answer:
11 is the common difference of the given sequence.
Step-by-step explanation:
Here the given sequence is
Terms 1 2 3 4
Sequence -12 -1 10 21
Now we know the arithmetic sequence is -12, -1, 10, 21.........n terms
common difference of an arithmetic sequence is represented as difference of nth term and (n-1)th term.
Therefore common difference d = -1 - (-12) = -1 +12 = 11
common difference 11 is the right answer.
