Those that finish the marathon will get a medal - if-then form
1 answer:
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Answer:
a. F(x)=10x-1 , the value of F(-2) is
F(-2)=10(-2)-1
f(-2)= -20-1
f(-2)= -21
b. g(x)= -5x+13 , the value of g(1)
g(1)= -5(1)+13
g(1)= -5+13
g(1)= 8 or +8
c. h(x)=-x-12 , the value of h(3) is
h(3)=-3-12
h(3)=9-3-12
h(3)= -6
Step-by-step explanation:
Answer:
And we can find this probability using the complement rule and with the normal standard table or excel:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the average household spent of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability using the complement rule and with the normal standard table or excel: