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qwelly [4]
4 years ago
15

What is the sum of 3x^3-2x+8, 2x^2+5x and x^3+2x^2-3x-3 PLEASE HELP

Mathematics
2 answers:
sdas [7]4 years ago
8 0

Answer:

The sum of given expressions is 4x^3+4x^2+5.

Step-by-step explanation:

The given expressions are

3x^3-2x+8,2x^2+5x,x^3+2x^2-3x-3

We have find the sum of all these expressions.

3x^3-2x+8+2x^2+5x+x^3+2x^2-3x-3

Combine like terms.

(3x^3+x^3)+(2x^2+2x^2)+(-2x+5x-3x)+(8-3)

4x^3+4x^2+(0)+(5)

4x^3+4x^2+5

Therefore the sum of given expressions is 4x^3+4x^2+5.

ss7ja [257]4 years ago
4 0
When adding/subtracting variables you can only add/subtract those variable that are of the same power....

3x^3-2x+8+2x^2+5x+x^3+2x^2-3x-3

(3x^3+x^3)+(2x^2+2x^2)+(-2x+5x-3x)+(8-3)

4x^3+4x^2+5

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A tree in leilas backyard has been growing for 3 1/5 years. It is 3/4 meters tall how many meters per year?
IgorC [24]

Answer:

The tree grew 15/64 meters per year.                  

Step-by-step explanation:

Given

  • Length of a tree = 3/4 meters
  • Total time taken by the tree to grow 3/4 taller = 3 1/5 or 16/5 years

To determine

Per year growth of the tree in meters

Per year growth of the tree in meters can be determined by dividing the total length of a tree i.e. 3/4 meters by the total time taken by the tree to get 3/4 taller.

Per year growth of tree = Total Length  / Total time to grow

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                                        = 3/4 × 5/16

                                        = [3×5] / [4×16]

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4 0
3 years ago
20/60+15/60=35/60&gt;<br> What dose it equal
stepladder [879]

Answer:

\dfrac{7}{12}

Step-by-step explanation:

1. Find the Greatest Common Factor of the numerator and denominator.

The prime factors of 35 are             <u>5</u>,     7,                              35  

The prime factors of 60 are 2, 3, 4, <u>5</u>, 6,     10, 12, 15, 20, 30,      60

The only common factor of 35 and 60 is 5.

2. Divide the numerator and denominator by the Greatest Common Factor.

\dfrac{35}{60} = \mathbf{\dfrac{7}{12}}

8 0
4 years ago
What is the result of converting 60 pounds?
Molodets [167]

Answer:

To kilos? About 132.2. To dollars? Google the exchange.

7 0
3 years ago
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