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kykrilka [37]
3 years ago
12

Which answer is correct

Mathematics
1 answer:
andre [41]3 years ago
7 0

Hello from MrBillDoesMath!

Answer:

The first choice,  Pi + (-Pi) = 0

Discussion:

Pi is an irrational number. Saying the irrational numbers <u>are</u> closed under addition means if we add two irrational numbers we will get another irrational number. In our case, Pi + (-Pi) = 0, which is correct, BUT 0 is a <u>rational </u>number. This shows the set of irrational numbers is NOT closed under addition.

Thank you,

MrB

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What is wrong with this problem. 2(n +3) = 2n +3
LekaFEV [45]

Steps to solve:

2(n + 3) = 2n + 3

~Distribute left side

2n + 6 = 2n + 3

~Subtract 6 to both sides

2n = 2n - 3

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n = -3

Best of Luck!

7 0
3 years ago
What is the solution to the equation √8x=√4+2x?
dolphi86 [110]

Answer:

0.3333333333333...........

7 0
3 years ago
a class with 30 students had an average score of 80 on a test. A class with 20 students had an average score of 90 on the same t
snow_tiger [21]

The average score of all the students in both classes is 84.

<h3>How to calculate the average?</h3>

The class with 30 students had an average score of 80 on a test. The total score will be:

= 30 × 80

= 2400

A class with 20 students had an average score of 90 on the same test. The total score will be:

= 20 × 90

= 1800

Total scores = 2400 + 1800 = 4200

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The average score will be:

= Total score / Total students

= 4200 / 50

= 84

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brainly.com/question/24313700

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8 0
1 year ago
A total of 234 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student t
lorasvet [3.4K]
234 = a + s                                                       s = students       a = adults
2a = s
after you get the equations you solve. plug 2a into the above equation.
so u get 
234 = a + 2a 
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78 = a
so 78 adult tickets were sold

3 0
3 years ago
The radius of a circle can be found by dividing the circumference of the circle by 6.28. What is the radius of a circle that has
steposvetlana [31]
The radius of a circle is found by doing this :
circumference ÷ 6.28 = radius

The circumference here is 17.27 feet :
circumference ÷ 6.28 = radius
so
17.27 ÷ 6.28 = 2.75


The radius of the circle is 2.75 feet.






5 0
3 years ago
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