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inysia [295]
3 years ago
6

There are boys and girls in a class. if the number of girls is multiplied by two and added to the number of boys in the class, t

he sum is 30. if the number of girls is multiplied by two and the number of boys in the class is subtracted from it, the result is 6. how many boys are in the class?

Mathematics
1 answer:
topjm [15]3 years ago
5 0
Find the attachment below........

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Factoring by grouping<br><br> x^2 + 4y + 2x + 2xy<br> pls explain with work too!!!
Gennadij [26K]

{x}^{2}  + 4y + 2x + 2xy

We can factorise this expression by grouping. First let us arrange it in this way

=  {x}^{2}  + 2xy + 2x + 4y

Let us bracket them like this:

= ( {x}^{2}  + 2xy) + (2x+ 4y)

In the first bracket portion, take x as common and in the second expression, take 2 as common.

= x(x + 2y) + 2(x + 2y) \\  = (x + 2)(x + 2y)

<u>Answer</u><u>:</u>

(x + 2)(x + 2y)

Hope you could understand.

If you have any query, feel free to ask.

7 0
3 years ago
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Dmitry [639]

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Step-by-step explanation:

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3 0
3 years ago
What is the slope of the line that passed through (3,-4) and (4,9)
Advocard [28]

Step-by-step explanation:

<u>Step 1:  Find the slope</u>

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Answer: The correct answer is 18ft

Step-by-step explanation:

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