2) flying with the wind a plane went 183 km/h. flying into the same wind the plane only went 141 km/h.
find the speed of the plane in still air and the speed of the wind.

Speed of plane in still air = 162 km/h  

Speed of wind = 21 km/h

Step-by-step explanation:

Flying with the wind a plane went 183 km/h. Flying into the same wind the plane only went 141km/h. Find the speed of the plane in still air and the speed of the wind.  

Let plane speed in still are be "p".

Let wind speed be "w"

Equations:

p + w = 183 km/h

p - w = 141 km/h

Add and solve for "p":

2p = 323

plane speed in still air = 161.5 km/hr

Solve for "w":

p + w = 183

161.5 + w = 183

wind speed = 21.5 km/hr

answer: all the values are within because it has a pattern that repeats from -6 to 4.

good luck!