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2 years ago

(x3 + 9x2 + 1)(3x2 + 4x − 4)

Mathematics

1 answer:

kap26 [50]2 years ago

4 0

I don’t understand the question so I answer in two ways

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Choose the expression that is equivalent to both −x/y and x/−y.

tensa zangetsu [6.8K]

Answer:

1÷y/-x

Step-by-step explanation:

1÷y/-x

1×-x/y

-x/y

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2 years ago

state+whether+each+sequence+is+a+academic+and+justify+your+answer+if+your+secrets+is+at+them+first+and+m+a+x+i+m+for+mature+acce

Sunny_sXe [5.5K]

What is that I have never seen a problem like that. Is this a actual question or are you playing around...‼️

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3 years ago

A rectangular area of 36 f t2 is to be fenced off. Three sides will use fencing costing $1 per foot and the remaining side will

OLga [1]

Answer:

x = 8,49 ft

y = 4,24 ft

Step-by-step explanation:

Let x be the longer side of rectangle and y the shorter

Area of rectangle = 36 ft² 36 = x* y ⇒ y =36/x

Perimeter of rectangle:

P = 2x + 2y for convinience we will write it as P = ( 2x + y ) + y

C(x,y) = 1 * ( 2x + y ) + 3* y

The cost equation as function of x is:

C(x) = 2x + 36/x + 108/x

C(x) = 2x + 144/x

Taking derivatives on both sides of the equation

C´(x) = 2 - 144/x²

C´(x) = 0 2 - 144/x² = 0 ⇒ 2x² -144 = 0 ⇒ x² = 72

x = 8,49 ft y = 36/8.49 y = 4,24 ft

How can we be sure that value will give us a minimun

We get second derivative

C´(x) = 2 - 144/x² ⇒C´´(x) = 2x (144)/ x⁴

so C´´(x) > 0

condition for a minimum

7 0

2 years ago

What is the simplest form of the expression below?

sineoko [7]

Answer:

(B) cot Theta

Step-by-step explanation:

We want to simplify the expression:

$\dfrac{cot\theta cos\theta}{sin\theta } X\dfrac{tan\theta}{\frac{sin\theta}{cos\theta tan \theta} }$

Now:

$\dfrac{ cos\theta}{sin\theta } =cot\theta\\\dfrac{ sin\theta}{cos\theta }=tan \theta\\$Substituting these into the expression\\\dfrac{cot\theta cos\theta}{sin\theta } X\dfrac{tan\theta}{\frac{sin\theta}{cos\theta tan \theta} }=cot\theta cot\theta X\dfrac{tan\theta}{\frac{tan\theta}{ tan \theta} }\\=cot\theta cot\theta X tan\theta$ (Since cot\theta X tan\theta =1) \\$Therefore our result:\\=cot\theta$

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2 years ago

Read 2 more answers

What time would it be 3 hours after 6:05

SpyIntel [72]

3+6=9

The time would be 9:05

6 0

2 years ago