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sotoamerica0814
23.03.2020 •
Mathematics
G A car rental agency rents 180 cars per day at a rate of 30 dollars per day. For each 1 dollar increase in the daily rate, 5 fewer cars are rented. At what rate should the cars be rented to produce the maximum income, and what is the maximum income
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Ответ:
$33 per day
$5,445
Step-by-step explanation:
(30+x)(180-5x) = Income
Income = -5x² + 180x - 150x + 5400
I = -5x² + 30x + 5400
dI/dx = -10x + 30 = 0
x = 3
Rate: 30+3 = 33
Income = 33(180 - (5×3)) = 5445
Ответ:
Sam have![\$174](/tpl/images/0442/5367/3c562.png)
Step-by-step explanation:
Let
x-----> amount of money that Sam has
y-----> amount of money that Andy has
we know that
substitute equation B in equation A
Find the value of x