I need help please i’ll give u a brainliest for the right answer

Mathematics

1 answer:

nevsk [136]2 years ago

7 0

Answer:

around 4.1

Step-by-step explanation:

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What is -12(-3) + 7?

lys-0071 [83]

Hi!

This question is about math.

$-12(-3) + 7$

$36+7$

$=43$

Explanation: You had to used order of operations on this math problems. Then you can also used P-Parenthesis, E-Exponents, M-Multiply, D-Divide, A-Add, and S-Subtract. ("Please Excuse My Dear Aunt Sally".)

For Example: (65+15*8/2)

$15*\frac{8}{2}=60$

$65+60=125$

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katrin2010 [14]

$\dfrac{n^2+3n+2}{n^2+6n+8}-\dfrac{2n}{n+4}\\\\=\dfrac{n^2+2n+n+2}{n^2+4n+2n+8}-\dfrac{2n}{n+4}\\\\=\dfrac{n(n+2)+1(n+2)}{n(n+4)+2(n+4)}-\dfrac{2n}{n+4}\\\\=\dfrac{(n+2)(n+1)}{(n+2)(n+4)}-\dfrac{2n}{n+4}\\\\=\dfrac{n+1}{n+4}-\dfrac{2n}{n+4}=\dfrac{n+1-2n}{n+4}=\dfrac{1-n}{n+4}$

$Answer:\ \boxed{B.\ \dfrac{1-n}{n+4}}$

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3 years ago

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