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OLEGan [10]
4 years ago
12

2mn+4n^2 and 5m^2-7mn

Mathematics
2 answers:
Bingel [31]4 years ago
8 0

Answer:

2mn+4n^2 and 5m^2-7mn

Step-by-step explanation:

<em>The steps to follow to carry out this operation is to bring together those who are equal: 2mn + 4n ^ 2 and 5m ^ 2-7mn </em>

<em>We have</em>: 2mn and -7mn

<em>Therefore</em>: 5m ^ 2 + (2-7) mn + 4n ^ 2

<u><em>What will result in</em></u>: <u>5m ^ 2 - 5mn + 4n ^ 2</u>

Katen [24]4 years ago
5 0
Find the sum 2mn + 4n2 and 5m2 - 7mn 

<span>5m^2 + (2-7)mn + 4n^2 </span>
<span>=5m^2 - 5mn + 4n^2 </span>
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ILL MARK YOU BRAINLIEST!
Lorico [155]
B. 113.04
we know this by using the area method A=(pie)r^2
you add 6 into the r so (pie)6^2 wich equals 113.04
5 0
3 years ago
Two angles of a triangle are 55 and 55 it has two sides of equal length which could it be?
oksian1 [2.3K]

Answer:

A.

Step-by-step explanation:

The third angle is  180 - 2*55 = 70 degrees.

So with 2 sides and 2 angles equal it is an acute isosceles triangle.

5 0
3 years ago
Read 2 more answers
If the radius is 18 cm and the angle at centre of circle is 120° then the
PolarNik [594]

The area of a sector is 339.336 cm²

The area of a sector is defined to be as the region of space bounded by a boundary from the center of the circle.

It can be determined by using the formula:

\mathbf{A = \dfrac{\theta }{360}\times \pi r^2 }

Given that;

  • Radius r = 18 cm
  • Angle θ =  120°

Then. the area of the sector can be calculated as:

\mathbf{A = \dfrac{120}{360}\times \pi (18)^2 }

\mathbf{A = \dfrac{1}{3}\times 3.142 \times 324 }

A = 339.336 cm²

Learn more about the area of a sector here:

brainly.com/question/7512468?referrer=searchResults

4 0
2 years ago
A statement and a proposed negation are given below. Statement: The product of any irrational number and any rational number is
lesya692 [45]

Answer:

The proposed negation is not correct. A possible corect negation woulld be: There is an irrational number and, a rational number whose product is rational.

Step-by-step explanation:

From the given information above:

STATEMENT: "The product of <em>ANY</em> irrational number and <em>ANY </em>rational number is irrational".

From the above statement, the word <em>"ANY"</em> is very vital. Let assume we choose an element x from a particular set X of irrational numbers, as well as an element y from the set Y of a rational number, therefore, the statement has a use case and applies to every x and y element. Thus, in an effective mathematical way, the statement typically implies "for all x in set X and for all y in set Y, the product x*y is irrational.

However; from the negation of the "for all" statement is "there exists" (any text in discrete arithmetic will assist you to become fully aware of this fact). Any ramifications in the statement is likewise negated, i.e; if the statement infers that the resulted product of x and y is irrational, at that point the negation(invalidation) infers that the item isn't irrational. For example, it is rational. At the point when we set up every one of these facts, we get:

"There exist an element x in the set X, in addition to that; there exists an element y in set Y;  x*y is rational".

If we express that into the option given; the right option is:

"There exist an irrational number and a rational number whose product is rational"

4 0
3 years ago
What is the mean of 73 45 88 90 90 81 83
bogdanovich [222]
amount\ of\ numbers=7\\\\Mean=\frac{sum\ of\ numbers}{amount\ of\ numbers}=\frac{73+45+88+90+90+81+83}{7}=\frac{550}{7}\approx78,6
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3 years ago
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