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olga_2 [115]
3 years ago
8

Is the set of real numbers closed under addition? Explain why or why not. If it is not closed, give an example​

Mathematics
1 answer:
kicyunya [14]3 years ago
3 0

Answer: Yes, the set of real numbers is closed under addition.

Explanation:

Let x and y be two real numbers. Their sum x+y is some other real number. This is what it means when we say the set of real numbers is closed under addition. Taking any two numbers and adding them will get us some other real number.

There is no way to have x+y be nonreal while x,y are both real.

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son4ous [18]

Answer:

C

Step-by-step explanation:

y^2+4y-32=0\\(y+8)(y-4)=0\\y=4,-8

Therefore, the answer is C. Hope this helps!

5 0
4 years ago
Please tell me what x is 3(x+6)=48
Alekssandra [29.7K]

Answer

X=10

Step by step explanation

48÷3 = 16

16-6 = 10

7 0
4 years ago
Please hurry I will mark you brainliest <br> Find the surface area
erastova [34]

Triangle area = 8 x 3/2

= 12

12 x 2 = 24cm^2 for 2 triangles

Height of rectangle must be found, so use pythag on triangle

a^2+ b^2 = c^2

16 + 9 =c^2

C=5

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= 60

60 x 3 triangles in total is 180cm^2

180cm^2 + 24cm^2 = 204cm^2

Ans: 204cm^2

4 0
3 years ago
Hey Help. Give the answer to The Collatz Conjecture. If you don’t, then you’re not very nice.
Varvara68 [4.7K]

Answer:

10(5) = 50

Step-by-step explanation:

When you multiply 5(0), you get 0.

When you multiply 5(1), you get 5.

When you put them together, you end up with 50.

Hope this helps!

5 0
3 years ago
Read 2 more answers
How do you make x the subject of the formula when your formula is y= abx? Please can you show me how you worked it out if you an
GrogVix [38]
If you want to solve for x you have to get x alone on one side of the equals sign. In order to do that you have to get rid of the stuff on the same side by doing the opposite operation so that it cancels. What you do on one side you do on. the other side to keep the equation true.

y= abx

a and b are being multiplied by x so divide by ab to cancel them out (ab/ab is 1).

y= abx/ab (ab cancels)

now divide the other side by ab to keep the equation true.

y/ab= x

7 0
3 years ago
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