Let the speed of plane in still air be x and that wind be y
therefore:
x+y=490
x-y=390
next we solve for the values of x and y, first we add the above equations. This will give us:
2x=880
x=880/2
x=440 miles per hour.
substituting the value of x in one of the equations and solving for y we get:
440+y=490
y=490-440
y=50 miles per hour
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Answer:
What
Step-by-step explanation: I really knowing
Answer:
30 minutes
Step-by-step explanation:
We use the red line to determine the values
X = 360
Go up to the red line and go to the left
y = 30
