JuJu4710
31.03.2021 •
Mathematics
Sabine rode on a passenger train for 448.5 miles between 11:30 AM and 5:15 PM to visit a friend
in a different city.
Part A
What equation can Sabine use to find the average speed of the train in miles per hour while she
was riding? Choose numbers and symbols from the set shown to complete the equation. Use
parentheses as needed. Let R represent the average speed.
Solved
Show answers
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Ответ:
We have
First, move
to left side to get
Rewrite
as 
to get
The expression on the left equals zero if either of factors is zero thus the equation has 2 solutions
Hope this helps.