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VARVARA [1.3K]
3 years ago
9

Ms.Sim traveled to 42 countries in 60 days.At this rate,how many countries would he travel to in 40 days?

Mathematics
2 answers:
meriva3 years ago
7 0
28
42/60=x/40 so cross multiply
42x40=1680
60x=1680
÷60 ÷60
x=28 countries

this is right out of my notes how it was taught so i hope its right or shame on my teacher lol
eduard3 years ago
6 0
42/60 = x/40
x = 42 x 40 / 60
x = 28
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SVETLANKA909090 [29]
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3 years ago
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Solution :

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Demand for cola : 50 + 3x – 16y

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x(100 – 34x + 5y) + y(50 + 3x – 16y)

R(x,y)  = $100x-34x^2+5xy+50y+3xy-16y^2$

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In order to maximize the revenue, set

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$R_x=\frac{dR }{dx} = 100-68x+8y$

$R_x=0$

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$R_y=\frac{dR }{dx} = 50-32x+8y$

$R_y=0$

$8x-32y=-50$  .............(ii)

Solving (i) and (ii),

4 x (i)    ⇒       272x - 32y = 400

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So, x ≈  $ 1.70      and    y = $ 1.99

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3 years ago
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Rina8888 [55]
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3 years ago
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Answer:

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