Question

Find the midpoint of the two points

(-3,18) and (7,24)
A. (4,42)
B.(5,21)
C.(-2,3)
D.(2,21

Answer 1

Answer: D. (2, 21)

Step-by-step explanation:

Imagine that your teacher wanted you to find the midpoint of -3 and 7 on the number line. To do this, you would add up the given values and divide by 2.

(-3+7)/2 = 4/2 = 2

The value 2 is right in the middle of -3 and 7 on the number line. This result is also the x coordinate of the midpoint since the values I used were the x coordinates of the original points.

The y coordinates are handled the same way:

(18+24)/2 = 42/2 = 21

The y coordinate of the midpoint is y = 21

Overall, the midpoint is (2, 21)

Answer 2

Option (d)

`midpoint \: of \: the \: two \: points \: = ((x1 + x2)/(2)) \: ((y1 + y2)/(2))`

Let,

(-3,18) be (x1, y1). (7,24) be (x2,y2)

Substitute in this formula we get,

`(( - 3 + 7)/(2)) \: ((18 + 24)/(2))`

`((4)/(2)) \: ( (42)/(2))`

= (2, 21)