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

(a) Set of rational numbers

(b)

Step-by-step explanation:

Solving (a): Set that is closed under subtraction

The solution to this is rational numbers.

For a set of number to be closed under subtraction, the following condition must be true

Where

a, b, c are of the same set.

The above is only true for rational numbers.

e.g.

The operations and the result in the above samples are rational numbers.

Solving (b): Choice not close under addition[See attachment for options]

As stated in (a)

For a set of number to be closed under subtraction, the following condition must be true

Where

a, b, c are of the same set.

In the given options (a) to (d), only

is not close under addition because:

is irrational while is rational

In other words, they belong to different set

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

4 candies

step-by-step explanation:

7 x 28 = 196

200 - 196 = 4 candies remaining.