Let <em>a</em> be the speed of the plane and <em>w</em> the wind speed.
<em>a</em> - <em>w</em> = (8460 km)/(9 h) = 940 km/h
<em>a</em> + <em>w</em> = (9600 km)/(8 h) = 1200 km/h
Add these speeds together to eliminate <em>w</em> and solve for <em>a</em> :
2<em>a</em> = 1740 km/h
<em>a</em> = 870 km/h
Subtract the first vector from the second to eliminate <em>a</em> and solve for <em>w</em> :
2<em>w</em> = 260 km/h
<em>w</em> = 130 km/h
Answer:
I think the answer is 19
Step-by-step explanation:
x<=4
x is less than or equal to four
children less than or equal to four can ride the train for free
- 4/5*9x +4/5*20 - 3x= 4/5x- 6
-36/5*x+16-3x-4/5*x= -6
-36/5*x-15x/5-4/5*x=-6-16
-55/5*x=-22
-11x= -22
x= -22:(-11)
x=2
-4/5(9*2-20)-3*2=4/5*2-6
-4/5*(-2)-6=8/5-6
8/5-6=8/5-6
The volume of the ball has a diameter of 15 centimeters around 2 decimal places is 1767.15 cubic centimeters.
<h3>What is
Geometry?</h3>
It deals with the size of geometry, region, and density of the different forms both 2D and 3D.
A sports ball has a diameter of 15 cm.
Then the radius of the ball will be
r = d/2
r = 15/2
r = 7.5 cm
Then the volume of the ball will be
More about the geometry link is given below.
brainly.com/question/7558603
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