Damagingawsomeness2
01.04.2021 •
Mathematics
Markeyah and Cameron are on the Reagan Middle School Mathcounts team. During one of their
weekly practices, their teacher Mrs. Bratlie challenged them to a competition. Markeyah and
Cameron had to see how many equations they could each solve correctly in 10 minutes. After the
10 minutes were up, it was discovered that Markeyah had solved four equations correctly for
every three equations Cameron had solved correctly.
I
Is the number of equations Markeyah solved correctly
proportional to the number of equations Cameron solved
correctly? Explain your reasoning using a graph on the
coordinate plane. Be sure to label the axes.
Solved
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Ответ:
Andrew has a cell phone plan that provides 300 free minutes each month for a flat rate of $19. For any minutes over 300, Andrew is charged $0.39 per minute. Let x be the number of minutes Andrew uses per month and f(x) be the charges based on Andrew's cell phone plan. If then If then first 300 minutes are free and each minute of next (x-300) minutes costs $0.39, therefore Hence, { 19 + 0.39(x - 300), x > 300
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