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Ksivusya [100]
3 years ago
6

(H+k)-(j-2k) if h= -3 j= -2 and k= -9

Mathematics
1 answer:
nekit [7.7K]3 years ago
7 0
If you change all the variables to the given valuables, the new equation would be (-3 + -9) - (-2 - 2 x -9)


Solve what's in the parenthesis first. -3 + -9 is -12. -2 x -9 is -18, and -2 - -18 is 16. Then you do -12 - 16 and you get -28

-28 is the answer :D
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At a country concert, the ratio of number of boys to the number of girls is 2:7. If there are 250 more girls than boys, how many
Juliette [100K]

Answer:

100 boys at the concert

Step-by-step explanation:

When changing the ratio between the number of boys to the number of girls, it always has to be equivalent to the original ratio 2:7

So, convert the ratio 2:7 to a different ratio, but it still has to be equivalent to the ratio 2:7. By doing that, multiply both sides of the 2:7 ratio by 50:

  2   :   7

×50   ×50

To get:

100:350  ⇒  This ratio means that the ratio between the number of boys to the number of girls is now 100:350, but that’s okay to have because it’s still equivalent to the original 2:7 ratio.

So, using the new ratio 100:350, this means that there are 100 boys at the concert and 350 girls at the concert, and 350 is 250 more than 100 which proves what the question is asking. So there are 100 boys at the concert.

<u>Answer:</u> 100 boys at the concert

<em>I hope you understand and that this helps with your question! </em>:)

7 0
3 years ago
Someone help me with number 2 please
WARRIOR [948]
Dang that’s hard , hope somebody helps you.
4 0
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EleoNora [17]
I am guessing you want to round to the tenths, because nothing comes after the hundredths. So it would be 0.9. (But it would stay the same if you are rounding to the hundredths.)
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125

Step-by-step explanation:

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Consider the function f(x)=(x-9)/(x^3-81x)<br><br> Find the vertical asymptote(s) of f(x)
enyata [817]
Well, here's a harder one
Basically, to find a vertical asymptote, we set the denominator to 0. Like this:
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There are vertical asymptotes at x = 0, x = 9, and x = -9.

4 0
3 years ago
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