Answer:
Step-by-step explanation:
Let's call "v" the speed of the commercial airplane and call "t" at the travel time of the commercial plane
The distance in kilometers of the trip is: 1730 km
Then we know that:
Then for the jet we have that the speed is:
The flight time for the jet is:
Therefore:
Substituting the first equation in the second we have to:
Now solve for t
Answer:
x = 6
Step-by-step explanation:
Answer:
10c=h
Step-by-step explanation:
The graph showed 2h=20c
so h=10c
Answer:
Step-by-step explanation:
The slope of line AB is
The slope of line CD is
Since the slopes multiply to 
, these lines are perpendicular to one another.
Answer: 4
Step-by-step explanation: 1) You need to first understand the question and a way to do that is to list plainly the information given.
2) Let the number be (X)
3) For the equation from the first sentence given; 3(9x-1)
4) From the second sentence; 7(7+2x)
5) Equating both sentences together, since the question says they are the same 3(9x-1) = 7(7+2x)
6) Opening the bracket/expanding the equation.... 27x-3=49+14x
Solving further we will have 13x = 52
X= 52/13
= 4
