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aev [14]
3 years ago
10

Help please with explain so for further questions like this

Mathematics
1 answer:
Yakvenalex [24]3 years ago
8 0
Rmember (a/b)/(c/d)=(a/b)(d/c)=(ad)/(bc)this is just alot of busy work

find f+g first then find f-g


f+g=(x-4)/(x+9)+(x-9)/(x+4)
make denomenator the same
multiply left one by (x+4)/(x+4) and right one by (x+9)/(x+9)
[(x-4)(x+4)]/[(x+9)(x+4)]+[(x-9)(x+9)]/[(x+9)(x+4)]
[x²-16]/[(x+9)(x+4)]+[x²-81]/[(x+9)(x+4)]
[x²+x²-16-81]/[(x+9)(x+4)]
[2x²-97]/[(x+9)(x+4)]

now f-g
[x²-16]/[(x+9)(x+4)]-[x²-81]/[(x+9)(x+4)]
[x²-x²-16+81]/[(x+9)(x+4)]
[65]/[(x+9)(x+4)]


now we got
\frac{ \frac{2x^2-97}{(x+9)(x+4)} }{ \frac{65}{(x+9)(x+4)} }
invert and multiply
(\frac{2x^2-97}{(x+9)(x+4)})(\frac{(x+9)(x+4)}{65})
\frac{2x^2-97}{65}

2nd option
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Answer:

Table C

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form y/x=k or y=kx

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Table B

For x=-2, y=-4 ------>k=-4/-2=2  

For x=-1, y=-2 ------>k=-2/-1=2  

For x=1, y=3 ------>k=3/1=3  

This table has different values of k

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Table C

For x=-2, y=-4 ------>k=-4/-2=2  

For x=-1, y=-2 ------>k=-2/-1=2  

For x=1, y=2 ------>k=2/1=2  

For x=2, y=4 ------>k=4/2=2  

This table has the same value of k

therefore

the table C  represent a proportional relationship

Table D

For x=-2, y=-4 ------>k=-4/-2=2  

For x=-1, y=-2 ------>k=-2/-1=2  

For x=1, y=2 ------>k=2/1=2  

For x=2, y=6 ------>k=6/2=3  

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therefore

the table D does not represent a proportional relationship

3 0
3 years ago
Read 2 more answers
Find the volume of the composite solid.
OLEGan [10]

Here's the solution,

the volume of the given figure is :

=》

volume \:  \: of \:  \: (pyramid \:  + rectangular \:  \: prism)

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\dfrac{4 \times 5 \times 6}{3}

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now, volume of rectangular prism :

=》

l \times b \times h

=》

4 \times 5 \times 2

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volume of rectangular prism = 40 cm³

volume of composite figure = 40 + 40

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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(f – g)(x) =  3x^2 + 2 -( x^2 – 9)

Distribute the minus sign

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Combine like terms

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Answer:

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Step-by-step explanation:

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