They are running 13.1 miles per hour since half of 26.2 is 13.1
The steps in achieving the answer for the simplification are as follows:
1. The least common multiple of the denominators of the terms of the given is ab.
2. Multiply the expression with ab, such that,
(xy/a - 1/b) x (ab)
3. Simplifying,
xyb - a
4. Writing ab as the denominator of the expression in number, we get the final answer which is equal to,
<em> (xyb - a)/ab
</em>
100% + 30% = 130%
130% x = 520 Change a % to a decimal
(130/100) x = 520
1.3 x = 520 Divide by 1.3
x =520 / 1.3
x = 400
So the original cost of the item was 400 dollars.
In constructing 98% confidence intervals for means, it is true that the statistic is good enough, and is less uncertain.
<h3>What is a confidence interval?</h3>
A confidence interval expresses the degree of uncertainty surrounding a given statistic. A margin of error is frequently used with confidence intervals. It reveals the degree to which you may be certain that the findings of a poll or survey correspond to what you would anticipate discovering if it were possible to poll the complete population. Levels of confidence are inextricably linked to confidence intervals.
Your level of confidence in your findings is shown by the confidence interval. You can never be certain that your results will hold for future surveys or experiments. In statistics, being 95% or 98.5% certain is typically seen as "good enough."
Learn more about confidence intervals here:
brainly.com/question/16974109
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Answer:
x=13
y=5
13-5=8
13+5=18
Step-by-step explanation: