3 years ago

Using π = 3.14, find the area of a circle with a radius of 4.2. Round your answer to the nearest hundredth.

Mathematics

1 answer:

denpristay [2]3 years ago

4 0

Answer:

55.42

Step-by-step explanation:

The formula is A= pir^2

hope this helps

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F(x)=-9x^2-2x and g(x)=3x^2+6x-9, find (f-g)(x) and (f-g)(-4)

Sergio039 [100]

Answer:

$(f-g)(x) = -12x^{2} - 8x + 9$

(f-g)(-4) = -151

Step-by-step explanation:

To find f-g(x) we subtract the common terms. So

$f(x) = -9x^{2} - 2x$

$g(x) = 3x^{2} + 6x - 9$

(f-g)(x)

$(f-g)(x) = f(x) - g(x) = -9x^{2} - 2x - (3x^{2} + 6x - 9) = -9x^{2} - 2x - 3x^{2} - 6x + 9 = (-9 - 3)x^{2} + (-2 - 6)x + 9 = -12x^{2} - 8x + 9$

(f-g)(-4)

$(f-g)(x) = -12x^{2} - 8x + 9$

We replace x by -4

$(f-g)(-4) = -12(-4)^{2} - 8(4) + 9= -151$

(f-g)(-4) = -151

5 0

4 years ago

Evaluate the expression for c = –1.4.

Contact [7]

Answer:

the answer for that equation is 58.8

5 0

3 years ago

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The graph shows a reflection.<br><br> True or false: The pre-image and the image are not congruent.

LuckyWell [14K]

Answer:

False

Step-by-step explanation:

That is false

If the pre-image is reflected over any axis, the image will still be congruent to it

8 0

3 years ago

62.80 times 100 equals too

Hunter-Best [27]

The answer would be 6,280.

Hope this helps. c:

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4 years ago

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A classmate claims that having no slope and having a slope of 0 are the same. Is your classmate correct? Explain. ...?

swat32

I am assuming having no slope would be when a line is undefined, that would mean it is a vertical line <span>a line with 0 slope would actually be a straight horizontal line.</span>

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3 years ago