your middle school 900 students 1/3 of students bring their lunch at school. what is the value of the ratio of the number who do
1 answer:
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Answer:
Average running speed: 8.52 mph
Average biking speed: 15.52 mph
Step-by-step explanation:
The formula for velocity is v= d/t where d is distance and t is time.
We know that Jean runs a distance of 6 miles and rides a distance of 24 miles.
We know that if she runs at a x mph, then she rides at x + 7 mph.
From the formula of distance, we get that t = d/v
Therefore, substituting these values in the formula for time we get:
If we apply the general formula to this quadratic equation we get:
x= -2.19
x=8.52
Jean cannot have an average negative running speed. Therefore our answer is x= 8.52
And her average running speed is 8.52 mph and her average speed riding her bicycle is 15.52 mph