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defon
3 years ago
14

If f(x) = x2 -1, what is the equation for f–1(x)?

Mathematics
1 answer:
professor190 [17]3 years ago
3 0
Evaluate the function would be= x^2-f-x
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What are the domain restrictions of the function f(x) = the quantity of x squared plus 6x plus 9, all over 3x plus 15.
dangina [55]

Answer:

x = - 5

Step-by-step explanation:

Given

f(x) = \frac{x^2+6x+9}{3x+15}

The denominator of f(x) cannot be zero as this would make f(x) undefined. Equating the denominator to zero and solving gives the value that x cannot be.

solve : 3x + 15 = 0 ⇒ 3x = - 15 ⇒ x = - 5 ← excluded value

Domain x ∈ R , x ≠ - 5

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3 years ago
After 8 examinations, Kacey's average was 55. Her next result increased her average to 60. What was the next score?
Yuki888 [10]

Answer:

65

Step-by-step explanation:

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5 0
3 years ago
20 POINTS PLEASE HELP Determine whether each figure has rotational symmetry, line symmetry, both, or neither.
alexgriva [62]
1-rotational
2-rotational
3-rotational
4-neither

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4 0
2 years ago
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What is the y intercept for y = -4x + 19 y = 2x + 1
max2010maxim [7]

y=mx+b\\\\m-slope\\b-y\ intercept\\\\y=-4x+\boxed{19}\to\ y\ intercept\ is\ 19\to(0;\ 19)\\\\y=2x+\boxed{1}\to\ y\ intercept\ is\ 1\to(0;\ 1)

4 0
3 years ago
The ratio of boys to girls in math classes is 3.5. If there are 130 girls in these classes, how many boys must there be?
dsp73

Answer:

<h3><u>Required Answer</u><u>:</u><u>-</u></h3>

The ratio of boys and girls =3:5

Let

Number of boys=3x

Number of girls =5x

  • According to the question Numbers of girls=130

{:}\longrightarrow\sf 5x=130

  • Now interchange both sides and get x

{:}\longrightarrow\sf x={\dfrac {130}{5}}

{:}\longrightarrow\sf x=26

<h3>Now </h3>

The number of boys=3x

=3×26=78

\thereforeNumber of boys is 78.

4 0
3 years ago
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