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ash2905
24.09.2020 •
Mathematics
2. Each day the sharks at an aquarium are each
fed 6 pounds of fish for every 75 pounds of
their body weight. If a shark at the aquarium
weighs 225 pounds, how much fish should the
dolphin be fed? (You must set up a proportion
to earn full credit.)
Solved
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Ответ:
Deandre was billed for 121 minutes.
Step-by-step explanation:
Let x represent the number of minutes for which Deandre was billed in a month.
For his long distance phone service, Deandre pays a $7 monthly fee plus 7 cents per minute. Converting 7 cents to dollars, it becomes
7/100 = $0.07
If he made x minutes of distance call in a month, his total cost would be
0.07x + 7
Last month, Deandre's long distance bill was $15.47. It means that
0.07x + 7 = 15.47
0.07x = 15.47 - 7
0.07x = 8.47
x = 8.47/0.07
x = 121