3 years ago

I will give you branilest!

Mathematics

1 answer:

Yanka [14]3 years ago

6 0

About 455 days

hope this helped

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The perimeter of parallelogram ABCD is 46 inches. What is DA?

nadezda [96]

First we have 8x -5=3x+10, so x =3.
Hence AB =CD =19.
So 38+DA +BC =46, but DA =BC,
38+2DA=46, then 2DA =8,
DA =4.

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3 years ago

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Let f(x) = cos(x) + 2x. Where does f have critical points?

adell [148]

Answer:

f has no critical points.

Step-by-step explanation:

We are given:

$f(x)=\cos(x)+2x$

A function has critical points whenever its derivative equals 0 or is undefined.

Differentiate the function:

$f'(x)=-\sin(x)+2$

Since this will never be undefined, solve for its zeros:

$0=-\sin(x)+2$

Hence:

$\displaystyle \sin(x)=2$

Recall that the value of sine is always between -1 and 1.

Thus, no real solutions exist.

Therefore, f has no critical points.

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3 years ago

If f(1) =160 and f(n+1) = -2f(n), what is f(4)?

Margarita [4]

Answer:

-1280.

Step-by-step explanation:

f(n + 1) = -2 f(n):

As function of 1 = 160, function of 2 = -2 * 160 = -320.

function of 3 = -320 * -2 = 640 and

= function of 4 = 640 * -2 = -1280.

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3 years ago

Which expression is equivalent to 1/4 x − 36?

White raven [17]

B because of you do 1/4 times -144 you will get 36 which is equivalent to 1/4x - 36

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3 years ago

How many significant digits are in 80,000

yawa3891 [41]

2 because the equation can be reduced to: 8.0 x 10^4.

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