Answer:
Speed of the plane in still air: .
Windspeed: .
Step-by-step explanation:
Assume that is the speed of the plane in still air, and that is the speed of the wind.
The question states that when going against the wind (,) the plane travels in . Hence, .
Similarly, since the plane travels in when travelling in the same direction as the wind (,) .
Add the two equations to eliminate . Subtract the second equation from the first to eliminate . Solve this system of equations for and : and .
Hence, the speed of this plane in still air would be , whereas the speed of the wind would be .
left
basta left XD
FALSE !
x = 3
Given
4 : 8 = x : 6, expressing in ratio form, that is
= ( cross- multiply )
8x = 24 ( divide both sides by 8 )
Thus 4 : 8 = 3 : 6
we have the lines
x-3=6
x=6+3
x=9
this is a vertical line (parallel to the y-axis)
The slope is undefined
and
y=3x+4
The slope is m=3
Compare their slopes
1) Their slopes are not equal -----> are not parallel lines
2) Their slopes are not negative reciprocal -----> are not perpendicular lines
therefore