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OLga [1]
3 years ago
11

Perform the operation. (3x^2+4)-(-5x^2+4x-1)

Mathematics
1 answer:
Galina-37 [17]3 years ago
7 0

Answer:

8x^2-4x+5

Step-by-step explanation:

(3x^2+4)-(-5x^2+4x-1)

Let's start by removing the parentheses.

3x^2+4-(-5x^2)-4x+1

Now let's reorder the equation to make it easier to combine like terms.

3x^2+5x^2-4x+1+4

Combine like terms.

8x^2-4x+5

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Approximently how many centiliters are in 3 quarts? Round your answer to the nearest unit.
Alex787 [66]
There should be 283.9. (rounded to the nearest unit). :) <span />
6 0
3 years ago
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Suppose a bag contains 4 white chips and 6 black chips. What is the probability of randomly choosing a white chip, not replacing
Marysya12 [62]
There are 10 chips altogether. 4 of them are white.
4/10 is the chance of lifting out a white chip
There are 3 of them left and 9 chips altogehter.
4/10 * 3/9
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2/15

Comment
(my edit) it is not that 2/15 is wrong (although it is not entirely right).
1/3 is the correct answer if you assume that what happened during the first draw has nothing to do with what will happen on the second. It is like saying if you throw 11 heads in a row with a fair coin, what are the chances of throwing a heads on the 12th throw? The answer is 1/2. That is the same kind of question you have asked.

The two of us who have responded have really responded to what are the chances of drawing 2 white chips. The question really does not restrict us in a way that prevents us from saying that. I'll stick with
B <<<< answer
but I think it would be nice if the writer of the question made it clear that 1/3 should be the proper answer. I am glad you came back and posted the right answer. It makes me think. 

The semi right answer is B <<<<---- 

If my reasoning bothers anybody, I'll reedit again. I'm only leaving it because sometimes a mistake is more instructive than a given answer.
5 0
3 years ago
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PLEASE I NEED AN ANSWER ASAP! THANK YOU.
Brrunno [24]
D....the empty weight is 160gr
8 0
3 years ago
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Can someone help me round these two numbers? I completely forgot how ‍
tigry1 [53]

Answer:

Step-by-step explanation:

If you are rounding to nearest tenth

2.6  1.9

Nearest hundredth

2.6   1.87

If the number to the right of the one you want to round is 5 or above, you go up a number. If it's below, you go down 1.

Hope this helps.

5 0
3 years ago
If J/24 = K, then J/6 =
tensa zangetsu [6.8K]

Answer:

4K

Step-by-step explanation:

\frac{J}{24} = K ( multiply both sides by 24 to clear the fraction )

J = 24K ( divide both sides by 6 )

\frac{J}{6} = 4K

8 0
3 years ago
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