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oksian1 [2.3K]
2 years ago
12

Free points insta: (jqyneii) giving Brainliest to the first person :D make sure to get outside its good for you ily <3

Mathematics
1 answer:
kiruha [24]2 years ago
3 0

Answer:

THANKS FOR THE POINTS

Step-by-step explanation:

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Ernest wants to buy 21 new books for his book collection. If the average price for a
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Answer:

If each book cost $20.45 then you times it by 21 and the answer you would get is 429.45

Step-by-step explanation:

im 99% that its correct

3 0
2 years ago
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The total cost of producing a type of tractor is given by C(x)=11000−20x+0.02x2, where x is the number of tractors produced. How
marissa [1.9K]

Answer:

Step-by-step explanation:

You need to complete the square.

C(x) = 0.02(x^2 - 1000x  ...)  + 11000

C(x) = 0.02 (x^2 - 1000x + 500^2) + 11000 - 5000

C(x) = 0.02 (x^2 - 1000x + 500^2) + 6000

C(x) = 0.02(x - 500)^2 + 6000

Now if you look at the answer you will find that the square is completed. That means that number of tractors you could produce is 500 at a cost of 6000

There is a flow to this question that you may have trouble understanding.

First of all the 500^2. That comes from taking 1/2 of 1000 and squaring it. That's what you need to complete the square.

Bur that is not what you have adding into the equation. Remember that there is a 0.02 in front of the brackets.

500^2 = 250000

0.02 * 250000 = 5000

So that number must be subtracted to make the square = 0. When you remove the brackets, you should get 11000 all in all.

So what you have outside the brackets is 11000 - 5000 = 6000

The rest is just standard for completing the square.

5 0
2 years ago
Simplify each expression for x 4<br> a. -5x4<br> b. 7x-3
kirill [66]
Does x equal 4 ?if it does then a) -100
b) 25
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I'll try to give first person brainliest
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wot

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