In 1927, charles lindbergh was the first person to fly nonstop across the atlantic ocean. today, commercial airliners fly from new york to paris five times as fast, or 400 miles/hour faster than lindbergh's plane.
a. at what speed did charles lindbergh''s plane fly?
b. at what speed do commercial airplanes fly today?

plz show work on both

a. 100 mph

b. 500 mph

Step-by-step explanation:

a.

Let the speed of Lindbergh's plane be x.

Today's planes are 5 times faster, so their speed is 5x.

Today's planes speed is 400 mph faster than Lindbergh's speed.

x + 400 = 5x

5x = x + 400

4x = 400

x = 100

Lindbergh's speed was 100 mph

b. 5x = 5 * 100 = 500

Today's planes fly at 500 mph

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

-2

7 - 9 = -2

reversed:

-2 + 9 = 7