The speed of a bus from University A to University B was decreased by 20% to 48 miles per hour. What was the speed of the bus be
1 answer:
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Write the expression for each plan, and set them equal to each other.
For part a) solve for m.
For part b) substitute the value of m back into each expression.
For part a) solve for m.
For part b) substitute the value of m back into each expression.
Answer:
He needs 7 more consecutive successful first serves to raise his first serve percentage to 60%.
Step-by-step explanation:
After n consecutive serves, his total number of serves is going to be n+8, since he has already served 8 times. In the best case, his number of successful first serves is n+2.
His percentage of succesful first serves is the division of the number of succesful first serves divided by the total number of serves. So
We want . So
He needs 7 more consecutive successful first serves to raise his first serve percentage to 60%.