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professor190 [17]
3 years ago
9

The ticket office at Orchestra Center estimates that if it charges x dollars for box seats for a concert, it will sell 50 - x bo

x seats. The function S = 50x - x2 gives the estimated income from the sale of box seats. Graph the function, and use the graph to find the price for box seats that will give the greatest income.
Mathematics
2 answers:
yan [13]3 years ago
6 0
S=50x-x^2

dS/dx=50-2x

d2S/dx2=-2

Since acceleration is a constant negative, when velocity equals zero, it is at the absolute maximum point for S(x)...

dS/dx=0 only when 50-2x=0, 2x=50, x=25

So the price that will maximize income is $25.00 a seat.

And that maximum income is:

S(25)=50x-x^2

S(25)=$625.00


mamaluj [8]3 years ago
4 0

Answer:

$25 per box seat

Step-by-step explanation:

I took the exam

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nikklg [1K]
We can use linear combinations of the equations to eliminate variables.

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To eliminate y we'll make the linear combination of 3 times the first equation minus four times the second. 

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Adding,
x = 7

We could solve for y directly but let's use another linear combination, twice the first plus three times the second:

2(3x - 4y) + 3(-2x + 3y)= 2(1)+3(1)

y = 5

Check: 3(7)-4(5)=1 good.   -2(7)+3(5)=1 good.

Q18 Answer: (7,5)

y = -3x + 5
5x - 4y = -3

4y +1(5x - 4y) = 4(-3x + 5) + 1(-3)

5x = -12x + 20 -3

17 x = 17

x = 1
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Check: 5(1) - 4(2) = -3 good

Q19 Answer (1,2)

6x + 5y = 25
x = 2y + 24
6x = 12y + 144
5y = 25 - 12y - 144
17y = -119
y = -119/17= -7
x = 2y+24= 10
Check: 6(10)+5(-7)=25 good   2y+24=2(-7)+24=10=x good

Q20 Answer (10,-7)


3x + y = 18
-7x + 3y = -10
9x  + 3y = 54
9x - -7x = 54 - -10
16x = 64
x=4
y = 18 -3x = 18-12=6

Check: 3(4)+6=18 good,  -7(4)+3(6)=-10 good

Q21 Answer: (4,6)

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Ben bought a Rolex for $150,000 with a 100%<br> markup, how much will it cost?
FromTheMoon [43]

Answer:

300,000$

Step-by-step explanation

<h3>♣ Formulate:</h3>

Based on the given conditions,

formulate:

150,000 x (100% + 100%)

•••••••••••••••••••••••••••••••••

<h3>♠ Calculate</h3>

150,000 x (1 + 1)

= 150,000 x 2

= 300,000

{ Alternative Forms: 3 x 10⁵ }

Answer:

Ben bought a Rolex for $150,000 with a 100% markup, It will cost 300,000$

•♣••♠••♣••♠••♣••♠••♣••♠••♣•

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324 in^2

_________________________________

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Read 2 more answers
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