Yes it would be a triangular prism
19 per hour
27 dollars max
1 hour and 42 minutes she can rent it.
Let the speed of plane in still air be x and that wind be y
therefore:
x+y=490
x-y=390
next we solve for the values of x and y, first we add the above equations. This will give us:
2x=880
x=880/2
x=440 miles per hour.
substituting the value of x in one of the equations and solving for y we get:
440+y=490
y=490-440
y=50 miles per hour
-2* F
You do +3 +2 -4 -1 which equals to 0. Then you do 0 plus -2 which equals -2*F.