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Lelu [443]
2 years ago
10

Subtract the fraction and simplify the answer 13/15 - 1/5

Mathematics
1 answer:
Mrac [35]2 years ago
8 0
First, make sure that there is a common denominator, or in other words, the denominators, are the same. 

You have the numbers 15 and 5 and the lowest common multiple between the two is 15, and in order to make sure the denominators are both the same, you multiply 5 by 3. 

Now, whatever you do to the bottom, you make sure you do to the top. In other words, multiply the numerator by 3 as well, and the second fraction is now 3/15. You can now subtract 3 from 13 and the answer is 10/15. You can reduce that to 2/3 by factoring out a 5.

13/15 - 1/5 --> 13/15 - 3/15 = 10/15 --> 2/3
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2x^2+9x=-7 <br> Solve round to nearest tenth
Drupady [299]

Answer:

  x = -3.5 or -1

Step-by-step explanation:

Add 7 and factor.

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_____

<em>Comment on factoring</em>

Factoring ax^2 +bx +c = 0 requires you find factors of ac that have a sum of b. Here, you're looking for factors of 2·7 = 14 that have a sum of 9. If you're observant, you realize that 2+7=9, so 2 and 7 are the factors you want.

Now, you can write the factored form as ...

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The divisor "a" is used to simplify one or both of the factors. Here, we have ...

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4 0
3 years ago
Which of the following ordered pairs, when graphed on a standard
malfutka [58]
<h2><u>Answer:</u></h2><h2>\boxed{\boxed{\sf{(-2\frac{1}{3},\frac{1}{3})}}}</h2><h2 /><h2><u>Solution Steps:</u></h2>

______________________________

<h3>1.) First you need to graph all the ordered pairs:</h3>

(I have included the graph below)

<h3>2.) Then you determine which pairs are in the top left quadrant:</h3>
  • =(-2\frac{1}{3},\frac{1}{3})

So your answer is only \bold{(-2\frac{1}{3},\frac{1}{3})}.

______________________________

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Answer:

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(40 kids, 10 adults)

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