Answer:
x=3
Step-by-step explanation:
Yesterday, Carmen went on a bike ride. Her average speed was 8
2 answers:
Answer:
or
miles.
Step-by-step explanation:
Let x represent number of hours Carmen biked yesterday.
We have been given that yesterday Carmen's average speed was 8
miles per hour. So distance covered in x hours would be .
We are also told that Carmen biked for a combined total time of 9
hours. So the number of hours biked second day would be . The distance covered in
at a speed of 13 miles per hour would be
.
Total distance covered by Carmen would be:
Therefore, the total distance covered by Carmen in the two days would be miles.
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In order to figure this out you need to use Descartes Rule. I attached a picture showing Descartes Rule. If the signs changes for when x is positive then the number of times it changes are the possible positive solution. If the sign changes when x is negative then the number of times it changes are the possible negative solutions. With that said the answer is A. View the picture I have attached for the possible + - and imaginary solutions.
Answer = A) One possible positive solution.
Answer = A) One possible positive solution.
Answer:
95% Confidence interval for taxi fare: ($20.5,$24.2)
Step-by-step explanation:
We are given the following data set: for fares:
$22.10, $23.25, $21.35, $24.50, $21.90, $20.75, and $22.65
Formula:
95% Confidence interval:
Putting the values, we get,