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3 years ago

Brainliest to the most correct answer!!!

Mathematics

2 answers:

Anettt [7]3 years ago

4 0

Answer:

Well i will start that the answer is

" (x,y)= (-1/4, 4/3) 3y=2/3

Step-by-step explanation:

tino4ka555 [31]3 years ago

3 0

Answer:

Multiply the top equation by two because both y value will become opposites and will eliminate.

Please give Brainliest! I never got one! :)

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Solve.<br><br> Round to the nearest hundredth.<br><br> 29.3 = 1.7y

Elena-2011 [213]

Steps to Solve:

29.3 = 1.7y

29.3/1.7 = 1.7y/1.7

y = 17.2352941176

In this case, we round up the hundredths place because the number in the thousandths place is 5 or higher.

y = 17.24

Hope this helps!! :)

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3 years ago

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Vector has x, y, and z components of 4.00, 4.00, and 1.00 units, respectively. calculate the magnitude of .

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Magnitude = sqrt (4^2 + 4^2 + 1^2) = sqrt 33 Answer

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3 years ago

A density graph for all of the possible times from 80 hours to 190 hours can

kupik [55]

Answer:

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Step-by-step explanation:

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3 years ago

Which measurement is not equal to 3 m 30 dm or 300 cm or 3000 mm or 3000 cm

Ainat [17]

3000cm because if you look at the variables there is no more letter m's than anything so if you cancel out and see what is equal to 30 then you get 3000cm!!!!!

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3 years ago

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10. Determine the open interval(s) on which the function f(x) = 12x - x^3 is increasing.

Gre4nikov [31]

Answer:

$\large\boxed{x\in(-2,\ 2)}$

Step-by-step explanation:

$f(x)=12x-x^3$

Calculate the derivative of the function:

$f'(x)=\left(12x-x^3\right)'=(12x)'-\left(x^3\right)'=12-3x^2$

Calculate the zeros of the derivative:

$f'(x)=0\Rightarrow12-3x^2=0\qquad\text{add}\ 3x^2\ \text{to both sides}\\\\3x^2=12\qquad\text{divide both sides by 3}\\\\x^2=4\to x=\pm\sqrt4\\\\x=\pm2$

Let's check the derivative sign:

$f'(x)>0\iff12-3x^2>0\qquad\text{use the distributive property}\\\\-3(x^2-4)>0\\\\-3(x^2-2^2)>0\qquad\text{use}\ a^2-b^2=(a-b)(a+b)\\\\-3(x-2)(x+2)>0\\^{\qquad x=2\qquad x=-2$

Sketch a parabola open down

(before the brackets there is the number -3 < 0)

Look at the picture.

Where the derivative is negative, the function decreases.

Where the derivative is positive, the function increases.

Therefore your answer is:

$x\in(-2,\ 2)$

3 0

3 years ago