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Debora [2.8K]
3 years ago
5

Find f(-2) if f(x)= x^4 + 2x^2-1 Answer:?

Mathematics
1 answer:
Alika [10]3 years ago
6 0

Answer:

\huge{f( - 2) = 23}

Step-by-step explanation:

To find f(-2) substitute the value of x that's -2 into f(x) and solve

We have

f( - 2) =  ({ - 2})^{4}  + 2 ({ - 2})^{2}  - 1 \\  = 16 + 2(4) - 1 \\  = 15 + 8 \\  = 23 \:  \:  \:  \:  \:  \:  \:

Hope this helps you

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Use the distributive property to simplify the following expression 4x(x-6)
katrin [286]
We need to distribute the term 4x to x - 6. Basically, we need to multiply 4x by x, which gives us 4x², and 4x by -6, which gives us -24x. Putting our two derived terms together, we get 4x²- 24, which is your answer. Hope this helps and have a great day!
3 0
4 years ago
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The length of a rectangle is 3cm more than twice the width. The perimeter is 84 cm. Find the dimensions .
blsea [12.9K]

Width of the rectangle is 13 cm and length is 29 cm.

<u>Step-by-step explanation:</u>

Step 1:

Given perimeter of the rectangle = 84 cm. Let the width be x, then the length of the rectangle = 2x + 3. Use the formula for perimeter of a rectangle = 2(length + width) to find the dimensions.

84 = 2(2x + 3 + x) = 2(3x + 3) = 6(x + 1) [taking 3 as common factor outside)

⇒ 84 = 6x + 6

⇒ 78 = 6x

∴ x = 13

⇒ Width of the rectangle = 13 cm

∴ Length of the rectangle = 2x + 3 = 29 cm

4 0
3 years ago
Please help!! I will make you brainlest.
Law Incorporation [45]

Answer:

5) x = 12 6) y = 3.5

Step-by-step explanation:

For number 6 that one may be right I tried several ways and kept getting that answer

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3 years ago
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Plss answer my question..<br><br>​
Kipish [7]

Answer:

<em>Gradient of KL = 2</em>

Step-by-step explanation:

From the diagram, we are to calculate the gradient of KL. Gradient is salso known as the slope of the line.

Gradient of KL = ΔOK/ΔOL

Given

OK = 2OL

Substitute into the formula

From the diagram, ΔOL = -5

ΔOK = 2ΔOL

ΔOK = 2(-5)

ΔOK = -10

Hence;

Gradient = -10/-5

<em>Gradient of KL = 2</em>

<em></em>

4 0
3 years ago
Sonya wrote the equation y=0.1x+5 to find the total cost of her phone bill,y, based on the numbers of texts she sends per month,
FinnZ [79.3K]

Answer:

(0, 5)

Step-by-step explanation:

You get y-intercept when x=0

<u>For the given equation y-intercept is:</u>

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As a point on the graph it is: (0, 5)

Here y-intercept may represent flat rate of monthly fee.

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3 years ago
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