M(9, 8) is the midpoint of rs . the coordinates of s are (10, 10). what are the coordinates of r?
a) (18, 16)
b) (11, 12)
c) (9.5, 9)
d) (8, 6)

D) (8, 6)

Step-by-step explanation:

Given: M(9, 8) is the midpoint of RS . The coordinates of S are (10, 10).

Here we have to use the mid-point formula:

Here (x, y) is the midpoint.

(x, y) = M(9, 8)

(x2, y2) = (10, 10)

Here x = 9, y = 8 and x2 = 10 and y2 = 10

Now let's plug in these values in the mid-point formula and find (x1, y1)

Let's simplify and find the value of x1 and y1

So the coordinates of R(8, 6)

D) (8, 6)

Step-by-step explanation:

If (x,y) is a midpoint of a line segment joining and such that

and  (1)

Given : M(9, 8) is the midpoint of RS . The coordinates of S are (10, 10).

Let The coordinate of point R be (a,b).

Using (1) , we have

and  

and  

and  

and  

i.e. (a,b) = (8, 6)

Hence, the coordinates of R = (8, 6)

Thus , the correct answer is D) (8, 6)

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.

b and c

step-by-step explanation: