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kolezko [41]
3 years ago
14

F(-4)= x^2 + 4 The value of f(-4)

Mathematics
2 answers:
bekas [8.4K]3 years ago
7 0
Plug in -4 for x
(-4)^2 + 4 = 16 + 4
The solution: f(-4) = 20
satela [25.4K]3 years ago
6 0

Answer:

f

(

2

)

=

6

Explanation:

To evaluate f(2), substitute x = 2 into f(x).

Step-by-step explanation:

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A building has an entry the shape of a parabolic arch 22 ft high and 28 ft wide at the base, as shown below.
Ivenika [448]
The parabola is at Max of 22
5 0
2 years ago
Y = 2 - 4x input output
tester [92]

Every function is a rule which tells you how to associate inputs and outputs. The input, also known as independent variable, is often indicated with the letter x, while the output, also known as dependent variable, is often indicated with the letter y.

With this notation, we write y = f(x), read "y is a function of x", in the sense that the value of the variable y depends on the value of the variable x, and f is the function that tells you how y depends on x.

In your example, you have y = f(x) = 2-4x, which means "subtract four times the input (4x) from 2"

So, it doesn't matter which input you chose (i.e. the value for x), because you will always have to behave this way:

  • Pick an input value, x
  • Multiply it by four to get 4x
  • Subtract this number from 2: 2-4x

Here are some examples of explicit calculations: if I choose x = 2 and input, the workflow will be

  • Pick an input value, 2
  • Multiply it by four to get 8
  • Subtract this number from 2: 2-8=-6

So, if the input is 2, the output is -6

Similarly, if we choose x = 0 as input, we have:

  • Pick an input value, 0
  • Multiply it by four to get 0
  • Subtract this number from 2: 2-0=2

So, if the input is 0, the output is 2. And so on: for every possible value for x you have the correspondant value for y, with the function f telling you how to associate one with the other.

4 0
3 years ago
Which answer describe the type of sequence? 3,9,15,21
Alenkinab [10]

Answer:

The sequence is arithmetic

we know that

In an arithmetic sequence, the difference between consecutive terms is always the same and is called common difference

In this problem we have

3,9,15,21,...

Let

a1=3, a2=9,a3=15,a4=21

a4-a3=21-15=6

a3-a2=15-9=6

a2-a1=9-3=6

The sequence is arithmetic

The common difference is equal to

5 0
3 years ago
CAN SOMEONE JUST PLEASE ANSWER THIS ASAP FOR BRAINLIEST
AVprozaik [17]

x^2 - 9x + 20=x^2-4x-5x+20=x(x-4)-5(x-4)=(x-5)(x-4)

6 0
3 years ago
How to rationalize the denominator?​
VMariaS [17]

Step-by-step explanation:

So, in order to rationalize the denominator, we need to get rid of all radicals that are in the denominator.

Step 1: Multiply numerator and denominator by a radical that will get rid of the radical in the denominator. ...

Step 2: Make sure all radicals are simplified. ...

Step 3: Simplify the fraction if needed.

3 0
3 years ago
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