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Ivanshal [37]
3 years ago
8

F(x)=x^(2)+6x-78 completing the square fill in the blanks: f(x)=(x+blank)^2+blank

Mathematics
1 answer:
krek1111 [17]3 years ago
8 0
The blank: f(x) = (x+3)^2-78+9
You can combine the negative 78 and 9 if you want to, but that should be the next step for that problem.
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Jean’s salary last month was $3200. Because of worse beneficial result of her company, this month her salary decreased to $2720.
vesna_86 [32]

Answer:

15%.

Step-by-step explanation:

3200 x .15 = 480

3200 - 480 = 2720

Feel free to let me know if you need more help! :)

5 0
3 years ago
Which function is the inverse of f Superscript negative 1 Baseline (x) = negative one-fifth x minus four-fifths?
DedPeter [7]

Answer:

f(x) = -5x - 4

Step-by-step explanation:

We want to get the inverse of the following function:

f^-1(x) = (-1/5)x - 4/5

To do that, we have to replace x with f(x) and f^-1(x) with x, as follows:

x = (-1/5)f(x) - 4/5

And then solve for f(x), the inverse of f^-1(x).

x + 4/5 = (-1/5)f(x)

f(x) = -5x + (-5)4/5

f(x) = -5x - 4

To check our result we compute a pair (x, f(x))

x   f(x)

1   -5*1 - 4 = -9

which has to be equivalent to (-9, 1) in the original function

x      f^-1(x)

-9     (-1/5)*(-9) - 4/5 = 1

5 0
3 years ago
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an insurance company sells a policy that pays $50,000.00 in case of accidental death. According to company figures, the rate of
aliya0001 [1]
Answer: $23..50 see attachment for the explanation.  

5 0
3 years ago
How do you change a number ti a percentage?
Anit [1.1K]
My teacher taught me to make an imaginary decimal and 0 at the beginning of the number and then move the decimal to the end of the number... idk that may be the wrong way to do it but you can try :/
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Simplify the expression -4x(6x-7)
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The answer to the expression is -24x+28x

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3 years ago
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