(2a)3 = _____ This expression without exponents is?
2 answers:
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Answer:
x=
or 15x=-13
Step-by-step explanation:
20x+17=35x+30
20x-35x=30-17
-15x=13
x=
Answer:
There is an 84% probability that your standard refrigerator will last between 12 and 20 years.
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
A standard refrigerator's mean life expectancy is 18 years with a standard deviation of 2 years. This means that .
What is the probability that your standard refrigerator will last between 12 and 20 years?
This probability is the pvalue of Z when subtracted by the pvalue of Z when
. So
X = 20
has a pvalue of 0.8413
X = 12
has a pvalue of 0.0014
This means that there is a 0.8413-0.0014 = 0.8399 = 0.84 = 84% probability that your standard refrigerator will last between 12 and 20 years.
<span>Answer: Slope = -4.000/2.000 = -2.000
x-intercept = 2/6 = 1/3 = 0.33333
<span> y-intercept = 2/3 = 0.66667
What I'm trying to show in the graph is:
</span></span>
y tells us how far up the line goes.........
x tells us how far along...........
m is the Slope or Gradient i.e. how steep the line is.........
b is the Y-intercept i.e. where the line crosses the Y axis.......
I really hope this helps ^-^
What I'm trying to show in the graph is:
</span></span>
y tells us how far up the line goes.........
x tells us how far along...........
m is the Slope or Gradient i.e. how steep the line is.........
b is the Y-intercept i.e. where the line crosses the Y axis.......
I really hope this helps ^-^