Answer:C
Step-by-step explanation:
The speed of the windo is 217 mph in still air

The leading term is the term containing the highest power of the variable: the term with the highest degree. The leading coefficient is the coefficient of the leading term.
Answer:
6x - 24y
Explanation:
Expand -3(10x + 4y): -30x - 12y
= 
Simplify 
= 6x - 24y
Mordancy.
Answer:
A. { }
Step-by-step explanation:
Absolute value cannot be less than zero.
-4 < 0
There is no solution for x, ∈, R.
Hope this helps.