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amm1812
3 years ago
5

This one to help ASAP !

Mathematics
2 answers:
pantera1 [17]3 years ago
7 0

Answer:

C

Step-by-step explanation:

Hoochie [10]3 years ago
4 0
I’m pretty sure it’s “C”
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Ivahew [28]

Answer:

C

Step-by-step explanation:

First, to make things simpler, let's create a common denominator for every term. We can do this by multiplying (x+4) and (x+3) when the denominator has a (x+3) or (x+4), respectively. In other words:

(\frac{3}{x+3} -\frac{4}{x+4})\div (\frac{2x}{x+3}-\frac{x}{x+4})

(\frac{3(x+4)}{(x+3)(x+4)}-\frac{4(x+3)}{(x+4)(x+3)}) \div (\frac{2x(x+4)}{(x+3)(x+4)} -\frac{x(x+3)}{(x+4)(x+3)} )

Now that they all have a common denominator, we can combine them:

(\frac{3(x+4)-4(x+3)}{(x+3)(x+4)})\div (\frac{2x(x+4)-x(x+3)}{(x+3)(x+4)}  )

Now, divide them. Recall how to divide fractions. You "flip" the second term and change the division sign into a multiplication sign.

=(\frac{3(x+4)-4(x+3)}{(x+3)(x+4)})\cdot (\frac{(x+3)(x+4)}{2x(x+4)-x(x+3)} )

Notice the denominator of the first term and the numerator of the second; we can cancel them out.

=\frac{3(x+4)-4(x+3)}{2x(x+4)-x(x+3)}

Now, we just need to simplify.

=\frac{(3x+12)+(-4x-12)}{(2x^2+8x)+(-x^2-3x)} =\frac{-x}{x^2+5x} =\frac{-1}{x+5}=-\frac{1}{x+5}

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The percent change from 36 to 63 is 63/36=1.75 (multiply by 100 to get a percentage) 175%
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