Consider segment CD with coordinates C(7, -1) and D(-1, -6). Give the x coordinate of the midpoint of the segment?

Explanation:

The x coordinate of point C is x = 7

The x coordinate of point D is x =  -1

Add up these x coordinates to get 7+(-1) = 6

Then cut that result in half: 6/2 = 3

The x coordinate of the midpoint is 3

The y coordinate of the midpoint is found in a similar fashion. You should find the midpoint is located at (3, -3.5) which is the same as saying (3, -7/2) since -7/2 = -3.5

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column