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3 years ago

(3n³ - 5n + n²) - (-8n² + 3n³) please shawty please

Mathematics

2 answers:

elixir [45]3 years ago

8 0

Answer:

$9n^2 - 5n$

Step-by-step explanation:

$(3n^3 - 5n + n^2) - (-8n^2 + 3n^3)$

Lets open the brackets. Signs of all the terms in the bracket next to the minus sign will change.

$=> 3n^3 - 5n + n^2 + 8n^2 - 3n^3$

Now lets add/substract all the like terms with each other.

$=> 3n^3 - 3n^3 + n^2 + 8n^2 - 5n$

$=> 9n^2 - 5n \: \: or \:\: n(9n - 5)$

satela [25.4K]3 years ago

3 0

Answer:

Step-by-step explanation:

$3n^3-5n+n^2+8n^2-3n^3\\ \\ 9n^2-5n\\ \\ or\ n(9n-5)$

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What is the square root of 16?

natulia [17]

square root of 16 would be 4

4 x 4 = 16

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4 years ago

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A box is in the shape of an equilateral triangular prism. if the box is to be covered with paper on its lateral sides, how many

Zarrin [17]

The total surface area of the triangular prism that has a height of h and the side length of a is given below.

$\rm a(\dfrac{\sqrt3}{2} \ a + 3h)$

<h3>What is a triangular prism?</h3>

A triangular prism is a closed solid that has two parallel triangular bases connected by a rectangle surface.

A box is in the shape of an equilateral triangular prism.

If the box is to be covered with paper on its lateral sides.

Let a be the side length of the equilateral triangle and h be the height of the prism.

Then the surface area of the triangular prism will be

Surface area = 2 × area of triangle + 3 × area of the rectangle

The area of the triangle will be

$\rm Area\ of\ triangle = \dfrac{\sqrt{3}a^2}{4}$

The area of the rectangle will be

$\rm Area \ of \ rectangle = a \ h$

Then the total surface area will be

$\rm Surface\ area = 2 \times \dfrac{\sqrt3 a^2 }{4} + 3 ah\\\\\\Surface\ area = a(\dfrac{\sqrt3}{2} \ a + 3h)$

More about the triangular prism link is given below.

brainly.com/question/21308574

7 0

2 years ago

In the diagram, lines and intersect at E. If m∠AED = 3x + 11 and m∠CEB = 125, find x. A. 19 B. 38 C. 42 D. 55

Lady_Fox [76]

3X+11=125

3X=125-11

3X=114

X=114/3

X=38

So the answeris B 38

7 0

3 years ago

A 14 gram sample of a substance that's used to preserve fruit and vegetables has a k-value of 0.1092. Find the substance's half-

nignag [31]

Answer:

t = 6.3

Step-by-step explanation:

N=Noe^(-kt)

No = 14 grams

k = .1092

We want to find t when N = 7 or 1/2 of 14

N=Noe^(-kt)

7 = 14 e ^ (-.1092t)

Divide each side by 14

1/2 = e ^ (-.1092t)

take the natural log of each side

ln (1/2) = ln e ^ (-.1092t)

ln (1/2) = -.1092t

Divide each side by -.1092

ln (1/2)/ -.1092 = t

t≈6.3475

Rounding to the nearest tenth

t = 6.3

5 0

4 years ago

NEED ANSWER ASAP!!!! <br> y=−x^2−2x+3 <br> When is g(x) = 0?

Crazy boy [7]

Answer:

$y=3$

Step-by-step explanation:

Since g(x)=0, you input 0 into every x

$y=-(0)^{2} -2(0)+3$

Which then becomes:

$y=0+3$

Take out the 0 and there's your answer

7 0

3 years ago