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jolli1 [7]
3 years ago
15

Solve for n. 2n − 3/5=5

Mathematics
2 answers:
Misha Larkins [42]3 years ago
6 0
2n-3/5=5
2n=5+3/5
2n=5,6
n=5,6:2
n=2,8
hjlf3 years ago
3 0
2n=5 3/5 28/5 * 1/2

The answer is 14/5
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The perimeter of an equilateral triangle is 26 centimeters. Find the altitude of the triangle
ioda

We have P = 3 x a (the formula of the perimeter); 26 = 3 x a ; we obtain a = 26/3;

Then, we have  <span>the Pythagorean Theorem in one of two rectangular and congruent triangles :</span>

h² = a² - (a/2)² = a² - a²/4 = 4a²/4 - a²/4 =<span> 3a²/4</span>

It follows that

h = √(3a²/4) = a√3/2 ≈ 0,866*a ≈ 7,5 centimeter.

5 0
3 years ago
4 + (x + y) = (4 + x) + y
Bezzdna [24]

The property in the expression 4 + (x + y) = (4 + x) + y is Commutative property.

<h3>What is the number?</h3>

A number is a mathematical entity that can be used to count, measure, or name things. For example, 1, 2, 56, etc. are the numbers.

It is given that:

4 + (x + y) = (4 + x) + y

As we know,

Commutative property is the property in which we can arrange the terms withouth changing the sign.

For an example:

a + b = b + c

In the given expression

4 + (x + y) = (4 + x) + y

The Commutative property is applied to rearrange the terms.

Thus, the property in the expression 4 + (x + y) = (4 + x) + y is Commutative property.

Learn more about the number here:

brainly.com/question/17429689

#SPJ1

3 0
2 years ago
Surds question pls help me out! Ty!
ch4aika [34]

Step-by-step explanation:

Question 46.

(2\sqrt{5}-\sqrt{2}  )^2=(2\sqrt{5})^2-2*2\sqrt{5}*\sqrt{2}  +(\sqrt{2})^2 } =4*5-4*\sqrt{2*5} +2=\\=20-4\sqrt{10}+2=22-4\sqrt{10}.

Answer: E. None of these.

Question 47.

\frac{4\sqrt{5} }{\sqrt{3} } =\frac{4*\sqrt{5}*\sqrt{3}  }{\sqrt{3} *\sqrt{3} } =\frac{4*\sqrt{5*3} }{3}=\frac{4\sqrt{15} }{3}  .

Answer: E. None of these.

6 0
2 years ago
Read 2 more answers
What is −20÷45−20÷45 ?<br><br><br> A. −25<br><br> B. −16<br><br> C− 1/16<br><br> D. − 1/25
stealth61 [152]
The answer is -25 i just took the test/quiz
7 0
4 years ago
Simplify: 12(3y + x)
Luda [366]
<h2>Answer:</h2><h2>36y + 12x</h2><h2></h2><h2>Hope this helps!!</h2>

3 0
3 years ago
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