leothedrifter
17.02.2021 •
Mathematics
Lashawn is running a marathon - that's 26 miles! After 1 mile, she has run for 9 minutes.
After 2 miles, she has run for 18 minutes. After 3 miles, she has run for 27 minutes. After
4 miles, she has run for 36 minutes.
Is the time Lashawn has run a function of the number of miles? If so, is it linear? Explain
your reasoning.
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Ответ:
7x + 5y = 145
multiply first equation by 7 and second by -4:-
28x + 77y = 1036
-28x - 20y = -580 Adding:-
0 + 57y = 456
y = 456 / 57 = 8
Cost of a student ticket = $8 Answer