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allochka39001 [22]
3 years ago
14

How do I do this? Please explain in detail.

Mathematics
2 answers:
umka2103 [35]3 years ago
8 0
22.5/(x-6) + 22.5/(x+6) = 9
multiply by x-6
=> (x-6)22.5/(x-6) + (x-6)22.5/(x+6) = 9(x-6)
=> 22.5 + (x-6)22.5/(x+6) = 9(x-6)
multiply by x+6
=> (x+6)22.5 + (x+6)(x-6)22.5/(x+6) = 9(x-6)(x+6)
=> (x+6)22.5 + (x-6)22.5 = 9(x-6)(x+6)
distribute
=> 22.5x+6(22.5) + 22.5x - 6(22.5) = 9(x^2 - 36)
=> 45x = 9x^2 - 9(36)
=> 0 = 9x^2 - 45x - 9(36)
divide by 9
=> 0 = x^2 - 5x - 36
=> 0 = x^2 - 5x - 36
=> 0 = (x - 9)(x + 4)
x=9 and -4
Neporo4naja [7]3 years ago
7 0
Https://us-static.z-dn.net/files/d39/8be32892e96d7954b568343588bbf6c2.jpeg

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Answer:

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Step-by-step explanation:

Solve using the left-> right rule. Note that they all have addition signs and that they are all positive numbers:

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6 0
3 years ago
Read 2 more answers
Which is the correct choice.
PtichkaEL [24]
A

Rate of change is another way to say slope. To find the slope of a line, use this formula:
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To find the slope of the function in the table, take two coordinates (I’ll use (-1, 5) and (1,9)) and plug them into the slope formula.

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