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sergij07 [2.7K]
3 years ago
10

How many telephone numbers are there in the 509 area code? Telephone numbers may not start with the number 0 or 1. They also mus

t not begin with 911 or 555. Do not consider other special circumstances.
Mathematics
1 answer:
Nata [24]3 years ago
5 0
7,999,998 is the number you are looking for
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velikii [3]

Answer:

32

Step-by-step explanation:

Step 1: Define

f(x) = 3x² - 5x - 4

g(x) = -4x - 12

Step 2: Find f(g(x))

f(g(x)) = 3(-4x - 12)² - 5(-4x - 12) - 4

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Step 3: Find f(g(-4))

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f(g(-4)) = 48(16) - 1232 + 496

f(g(-4)) = 768 - 736

f(g(-4)) = 32

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