The mean of their scores is their sum divided by the number of scores.
.. (84 +67 +74 +87 +67 +73)/6 = 452/6 ≈ 75.3
Answer:
0.000354
Step-by-step explanation:
Answer:f ( x - 1 ) = 3x² - 5x - 7
Step-by-step explanation:
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
