Answer:
The maximum speed of Hal's airplane in still air is:

The speed of the wind

Step-by-step explanation:
Remember that the velocity v equals the distance d between time t.
and 
The distance that Hal travels when traveling with the wind is:
miles
Where v is the speed of Hal and c is the wind speed.
The distance when traveling against the wind is:
miles
Now we solve the first equation for v




Now we substitute the value of v in the second equation and solve for c







Then:


The maximum speed of Hal's airplane in still air is:

The speed of the wind

Answer:
our numbers should be 15, 16, and 17.
Step-by-step explanation:
n + n+1 + n+2 = 48.
Subtract 153-63=90 and I am pretty sure that's what you have to do
Answer A) x-11
Hope this helps!
Answer:
perpendicular
Step-by-step explanation:
They form a 90 degree angle