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rewona [7]
3 years ago
11

Substitute x=-2y into the expression 6x-7 and simplify

Mathematics
2 answers:
Korolek [52]3 years ago
5 0

Answer:

-12y - 7

Step-by-step explanation:

x = -2y

6x - 7 or 6(-2y) - 7

-12y - 7

jarptica [38.1K]3 years ago
4 0

Answer:-12y -7

Step-by-step explanation: I think

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2. A museum has an admission fee of $14 and averages 300 visitors per day. The museum board
dlinn [17]

Answer:

The answer to the questions asked is:

a) The maximum possible income for the museum is $4,840 per day.

b) The increase you must make to obtain the maximum income is $8 per ticket.

c) The income of the museum without increasing the fee is $4200.

Step-by-step explanation:

To solve all the questions asked, we must take into account the provided equation:

  • <u>R = -10x2 + 160x + 4200 </u>

The first question asks for the maximum income, that is, the maximum amount of money that can be obtained by making increases in the rate, despite the loss of people, so you must replace the X in the equation with values ​​until instead of increase decrease:

  • R = -10 (1) 2 + 160 (1) + 4200 = 4350
  • R = -10 (2) 2 + 160 (2) + 4200 = 4480
  • R = -10 (3) 2 + 160 (3) + 4200 = 4590
  • R = -10 (4) 2 + 160 (4) + 4200 = 4680
  • R = -10 (5) 2 + 160 (5) + 4200 = 4750
  • R = -10 (6) 2 + 160 (6) + 4200 = 4800
  • R = -10 (7) 2 + 160 (7) + 4200 = 4830
  • <u>R = -10 (8) 2 + 160 (8) + 4200 = 4840 </u>
  • R = -10 (9) 2 + 160 (9) + 4200 = 4830

As you can see, when the increase is $9, the income falls, so <u>the maximum income is $4,840, while it can be seen that it occurs with an increase of $8, which answers the second question</u>.

For the third question, that is, the income of the museum without increasing the fee, you must remember that the variable X is the increase in the fee, therefore, if you want to obtain the income without an increase, it must be given a value of zero to the variable inside the equation, with which we obtain:

  • <u>R = -10 (0) 2 + 160 (0) + 4200 = 4200</u>
3 0
4 years ago
one day in october, agent sanchez enters the code 3477 how do you know this is code is incorrect and and will not open the door
kozerog [31]
Well first off the cia will say that they didn’t send him, but we know the truth. Second off that number is the last 4 digits to the illuminatis president, Tom Hanks. Lastly, that number is also the number of kids Joe Biden has sniffed in the last year.
5 0
2 years ago
We ate 31/6 pizzas. Write this amount as a decimal
Aleksandr [31]
5.16 is the answer. Hope I help. :)

6 0
4 years ago
PLEASE HELP ME!!!! In each diagram AB is tangent to C at B. Find the value of x.​
klio [65]
Answer is 9

Step by step explanation
As CB is radius CB=3, CA=3+7=10
X^2=(7+3)^2-3^2=100-9=81
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3 0
3 years ago
I really need help ASAP! <br> The sum of 8 times a number and 15 is 7 find that number
kirza4 [7]

Answer:

8x+15=7 8x=-8 x =-1

Step-by-step explanation:

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