MATHEMATICS HIGH SCHOOL

20+ POINTS!!! ANSWER FAST!!!Which sets of numbers are closed under addition?



Choose all answers that are correct.



A.


whole numbers


B.


natural numbers


C.


negative integers


D.


integers

Answers

Answer 1
Answer: It is all of them. A. Whole Numbers, B. Natural Numbers, C. Negative Numbers, D. Integers. This is because when ever you add any of these numbers to them selves, the answer will always be from that set of numbers. Like negative + negative = negative, like that.

Hope I helped ya!!!!!!!!!
Answer 2
Answer: ♥ Which sets of numbers are closed under addition?



♥ Choose all answers that are correct.



A.


whole numbers


B.


natural numbers


C.


negative integers


D.


integers  
♥are all closed under addition. 
♥Therefore ALL are right. 

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Solve (tan x)(2 sin x + 1) = 0 given that 0 < x < 2pi

Answers

Answer:

Step-by-step explanation:

hello :

here is an solution ....

The figure above represents a circle that has been dilated by a scale factor of 2.What is the measurement of the radius of the original circle?
Answer choices are below

A. 2 units

B. 2.75 units

C. 5.5 units

D. 11 units

Answers

if you look at the graph closely it has the y axis (top circle limit) on 5 and bottom -6
Same on the x axis to the left -5 to the right circle 6
total amount from onside to another is 11 which make the diameter 11.
Radius? divide the diameter which is 11/2 = 5.5
it says it has been dilated. If it has been re-sized smaller then it B. 2.75
5.5 divided by 2 = 2.75

Final answer:

The original circle's radius cannot be definitively determined from the question as is, because the dilated circle's radius is not specified. However, if the dilated circle's radius is known, the original radius can be found by dividing the dilated radius by the scale factor, which is 2 in this case.

Explanation:

The question represents a geometric concept in Mathematics, specifically dealing with dilation of a circle. In dilation, a figure is altered in size without changing its shape. If a circle is dilated by a scale factor of 2, meaning it has been made twice as large, the radius of the dilated circle will be two times the radius of the original circle. If the scale factor is 2, the radius's length will be halved to get the measurement of the original circle's radius. Therefore, without the specific measurement of the dilated circle's radius, we can't definitively give the original circle's radius from the options given (A. 2 units, B. 2.75 units, C. 5.5 units, D. 11 units).

Learn more about Dilation here:

brainly.com/question/29811168

#SPJ3

Over what axis was the square reflected in the first example?

Answers

Answer:

theres no picture attached

Step-by-step explanation:

What is the value of k?

Answers

Answer:

Step-by-step explanation:

recall that the inside angles of a triangle add up to 180°

and also that the angle 115° is the other part of a 180° total

180=115+y

180-115 =65

then the inside angle at Y  is 65°

add the three inside (interior of the triangle) angles up

180= 65 + (4k+5) + (6k+10)

180 = 65 + 10k + 15

180 = 80 + 10k

100  = 10k

10 = k

see how I did that?  

An equation in the system is y = x + 1. What is the other equation in the system if the solution is only at (0, 1)?x − y = 1

2x + 2y = 4

x + y = 1

x + 2y = 2

Answers

Answer:

The correct options are 3 and 4.

Step-by-step explanation:

An equation in the system is

y=x+1

The only one solution of the system of equation is (0,1). It means the equation must be satisfied by the point (0,1) and the equation is not equivalent to the given equation.

Two equations a_1x+b_1y+c_1=0 and a_2x+b_2y+c_2=0 are equivalent if

(a_1)/(a_2)=(b_1)/(b_2)=(c_1)/(c_2)

All the given equations are not equivalent equations because for all  equation s

(a_1)/(a_2)\neq (b_1)/(b_2)\neq (c_1)/(c_2)

Check each equation by (0,1).

For equation 1,

x-y=1

0-1=1

-1=1

This statement is false, therefore the option 1 is incorrect.

For equation 2,

2x+2y=4

2(0)+2(1)=4

2=4

This statement is false, therefore the option 2 is incorrect.

For equation 3,

x+y=1

0+1=1

1=1

This statement is true, therefore the option 3 is correct.

For equation 4,

x+2y=2

0+2(1)=2

2=2

This statement is true, therefore the option 4 is correct.

A)
x − y = 1
0 - 1 = 1
-1 = 1

Not true.

B)
2x + 2y = 4
2(0) + 2(1) = 4
0 + 2 = 4
2 = 4
Not true

C)
x + y = 1
0 + 1 = 1
1 = 1
True

D)
x + 2y = 2
0 + 2(1) = 2
2 = 2
True

The answer is C and D.

Multi Step Problem (Show work)
-k +4 - 5k = 1
​

Answers

Answer:

Subtract 5k from -k then you get

-6k + 4 =1

add 4 to both sides

-6k = -3

divide by -6 on both sides

k= -3/-6

simplify to get k= 1/2

Step-by-step explanation:

Answer:

k = 1/2

Step-by-step explanation:

-k - 5k = -6k

you minus 4 from each side

-6k = -3

you divide -6 from each side and you get-3/-6

which equals 1/2
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