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Lorico [155]
4 years ago
5

Which answer choice shows that the set of irrational numbers is not closed under addition

Mathematics
2 answers:
Delvig [45]4 years ago
7 0
Since you didn't give the choices, I can only help with the problem. Then, you can select the correct answer.

A set is closed under a given operation, if all possible values in the set would produce the same type of number when the operation is completed.

For example: 
The square root of 5 plus the square root of 5 is two square roots of 5.
Both of numbers are irrational and they produce an irrational result.

Here is one example, like you should be looking for.
Irrational numbers are not closed under addition because:
Pi plus a negative pi would be zero. 
Pi and negative pi are irrational however zero is not irrational.
Therefore, the set is not closed.
tatuchka [14]4 years ago
6 0

\pi +(-\pi )=0

this is the right answer

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UNO [17]
Answer should be
|-80-15| or
|15-(-80)|
5 0
3 years ago
Triangle ABC = triangle blank
coldgirl [10]

Answer:

QPR

Step-by-step explanation:

It is triangle QPR because of the order of corresponding angles.

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Which statement correctly describe the data shown in the scatter plot?
pentagon [3]

Answer:

Option C is correct, The scatter plot shows a positive association because y increases as x increases.

Step-by-step explanation:

We are given a graph of scatter plot of points. We need to choose correct option using graph.

Option A: The point (18,2) is an outlier. This point is not shown on graph.

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7 0
3 years ago
Read 2 more answers
Please assist me with this problem​
Verizon [17]
<h3>Answers:</h3><h3>x = sqrt(10)</h3><h3>y = sqrt(5)</h3>

============================================

Explanation:

Naturally I start with x as that letter precedes y in the alphabet; however, it's easier to start with y because it is a leg of this triangle. We will then use the value of y to find x later.

For any 45-45-90 triangle, the two legs are the same length. So that's why we're able to quickly see that y = sqrt(5)

To get the hypotenuse, we multiply the leg length by sqrt(2). This trick only works for 45-45-90 triangles.

hypotenuse = leg*sqrt(2)

x = sqrt(5)*sqrt(2)

x = sqrt(5*2)

x = sqrt(10)

The rule I used is sqrt(a)*sqrt(b) = sqrt(a*b)

----------------

An alternate path is to use the pythagorean theorem to find x

a^2+b^2 = c^2

(sqrt(5))^2 + (sqrt(5))^2 = x^2

5 + 5 = x^2

10 = x^2

x^2 = 10

x = sqrt(10)

3 0
3 years ago
Read 2 more answers
Can someone help me with this please.
tatuchka [14]

Answer:

x = 29

Step-by-step explanation:

(x + 3) + (x - 1) + (x + 1) = 90

3x + 3 = 90

3x = 87

x = 29

7 0
3 years ago
Read 2 more answers
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