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irakobra [83]
3 years ago
13

Ken paid $12 for two magazines. The cost of each magazine was a multiple of $3. What are the possible prices of the magazines?

Mathematics
2 answers:
Arlecino [84]3 years ago
4 0
Wouldn't it be 4 because 12 divided by 3 equals 3
anastassius [24]3 years ago
4 0
The possible prices is $6 each and $4
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Dy/dx of ln(x/x^²+1)
exis [7]

\dfrac{dy}{dx}\ \ln\left(\dfrac{x}{x^2+1}\right)=\dfrac{1}{\frac{x}{x^2+1}}\cdot\dfrac{x'(x^2+1)-x(x^2+1)'}{(x^2+1)^2}\\\\=\dfrac{x^2+1}{x}\cdot\dfrac{1(x^2+1)-x(2x)}{(x^2+1)^2}=\dfrac{1}{x}\cdot\dfrac{x^2+1-2x^2}{x^2+1}=\dfrac{1-x^2}{x^3+x}\\\\Used:\\\\(\ln(x))'=\dfrac{1}{x}\\\\\left[f(g(x))\right]'=f'(g(x))\cdot g'(x)\\\\\left(\dfrac{f(x)}{g(x)}\right)'=\dfrac{f'(x)g(x)-f(x)g'(x)}{[g(x)]^2}

5 0
3 years ago
Select the correct answer.
Luba_88 [7]
I think it Is B.....
7 0
2 years ago
Help me please..... please
Oksana_A [137]

Answer:

general rule Un=1.8n-21

U100=1.8(100)-21=159

Step-by-step explanation:

a5=a+4d,  a5=-12

a10=a+9d,  a10=-3

-12=a+4d

-3=a+9d subtract the system of equations

-9=-5d solve for d

d=1.8

substitute d into first equation to find a

-12=a+4(1.8)

a=-19.2

un. = a + (n − 1)d

Un=-19.2+(n-1)(1.8)

Un=1.8n-21

7 0
3 years ago
Help me please!!! And thank you!!!!
katen-ka-za [31]
<h2>Answer:</h2>

The last answer - 9x squared y squared

<h2></h2>

8 0
2 years ago
Is 0.343434 an irrational or rational?
Yuki888 [10]

Answer:

irrational

Step-by-step explanation:

a rational number is always a whole number

8 0
3 years ago
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