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Rainbow [258]
2 years ago
13

What is the simplified form of this expression (-3x^2+4x)+(2x^2-x-11)

Mathematics
2 answers:
uysha [10]2 years ago
8 0

<u>Given expression:</u>

(-3x^2+4x)+(2x^2-x-11)

To simplify the expression, it is needed to open the parentheses.

\implies (-3x^2+4x)+(2x^2-x-11)

\implies -3x^2+4x+2x^2-x-11

To further simplify the expression, let us combine like terms.

\implies -3x^2+4x+2x^2-x-11

\implies x^{2} (-3 + 2)+x(4-1)-11

Now, simplify the expression as needed.

\implies x^{2} (-3 + 2)+x(4-1)-11

\implies x^{2} (-1)+x(3)-11

Finally, open the parentheses to get the simplified form

\implies x^{2} (-1)+x(3)-11

\implies \boxed{\bold{-x^{2} +3x-11}}

\text{Therefore, the simplified expression is} \ \boxed{-x^{2} +3x-11}

zlopas [31]2 years ago
5 0

Answer:

SolutioN :

\bf \: \star ( - 3x^{2}  + 4x) + (2 {x}^{2}  - x - 11)

\longrightarrow \bf \:  - 3 {x}^{2}  + 4x + 2 {x}^{2}  - x - 11

\longrightarrow \bf \:  - 3 {x}^{2}  + 2 {x}^{2}  + 4x - x - 11

\longrightarrow  \boxed{\bf \:  - {x}^{2}  + 3x - 11}

-------------HappY Learning <3 ----------

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the total attendance at a concert in a theater hall was 1500, of this total 400 were children,850 were women , and the remaining
AleksandrR [38]

<u>Answer:</u>

Below!

<u>Step-by step explanation:</u>

<u>We know that:</u>

  • 400 + 850 + m = 1500

<u>Solution of Question A:</u>

<u>Percent of children: Total children/Total attendance</u>

  • => 400/1500
  • => 4/15
  • => 0.27 (Rounded to nearest hundredth)
  • => 0.27 x 100
  • => 27%

<u>Hence, the percent of children is about 27%.</u>

<u>Solution of Question B:</u>

<u>Percent of women: Total women/Total attendance</u>

  • => 850/1500
  • => 85/150
  • => 17/30
  • => 17/30 x 100
  • => 17/3 x 10
  • => 170/3
  • => 56.67%

<u>Hence, the percent of women is 56.67%.</u>

<u>Solution of Question C:</u>

  • 400 + 850 + m = 1500
  • => 1250 + m = 1500
  • => m = 1500 - 1250
  • => m = 250

<u>Percent of men: Total men/Total attendance</u>

  • => 250/1500
  • => 1/6
  • => 0.17 (Rounded to nearest hundredth)
  • => 0.17 x 100
  • => 17%

<u>Hence, the percent of men is about 17%</u>

Hoped this helped.

BrainiacUser1357

3 0
2 years ago
Suppose you want to learn more about the heights of the buildings in New York City. How would you choose a sample of the buildin
natulia [17]

Answer:

I'd use a Non-probability Sampling Method.

Explanation:

The question is already laced with criteria - Heights of Buildings in New York.

This means that there are certain buildings that won't fit in the sample. In a non-probability sample, objects or subjects are elected based on specified criteria that are not random. This means that not all objects/subject have a c<em>hance</em> of being included in the sample.

It is assumed that the question/assignment centers around high rise buildings.

Therefore, one storey buildings and bungalows that are within and outside New York will not be included in the sample.

Under the Non-Probability Sampling Method, it is essential to note that there are other subgroupings of sampling techniques. They are:

  1. Convenience Sample
  2. Voluntary Sample
  3. Purposive Sample
  4. Snowball Sample

Cheers!

3 0
3 years ago
Read 2 more answers
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Lady bird [3.3K]
Positive correlation as they go to bottom left to top right

6 0
3 years ago
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Which of the following is a counterexample for this conditional statement?If an appliance is used for cooling, then it is a refr
Nezavi [6.7K]

Explanation

We are asked to give a counter-example for the given statement

A counter-example is an example that opposes or contradicts an idea or statement.

Therefore, for the statement

we have that

Statement: If an appliance is used for cooling

Conclusion: then it is a refrigerator

Then, the option that contradicts this, will be a clothes dryer

Because a dryer doesn't cool

Hence, the answer is a cloth dryer

option D

4 0
1 year ago
A, b and c are the sides of a right triangle, where side a is across from angle a, side b is across from angle b, and side c is
Vera_Pavlovna [14]
<span>Find missing length :
</span>
a² + b² = c²
c² = 19² + 34²
c² = 1517
c = √1517
c = 38.95 units.


Find missing angle A:

\dfrac{a}{\sin(a)} =  \dfrac{c}{\sin(c)}

\dfrac{19}{\sin(a)} =  \dfrac{38.95}{\sin(90)}

\sin(a) = 0.488

a = sin^{-1} (0.488)

a = 29.2 \textdegree


Find Missing B:

\dfrac{b}{\sin(b)} = \dfrac{c}{\sin(c)}

\dfrac{34}{\sin(b)} = \dfrac{38.95}{\sin(90)}

\sin(b) = 0.873

b = sin^{-1}(0.873)

b = 60.8 \textdegree


Answer: Missing length =  38.95 units ; Missing angles =  29.2°  and  60.8° 

8 0
3 years ago
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