Pos. + Neg. = Pos. if |Pos.| > |Neg.|
Example:
10 + (-9) = 1
|10| = 10 > |-9| = 9
Pos. + Neg. = Neg. if |Pos.| < |Neg.|
Example:
10 + (-11) = -1
|10| = 10 < |-11| = 11
Pos. + Neg. = 0 if |Pos.| = |Neg.|
Example:
10 + (-10) = 0
|10| = 10 = |-10|
Neg. + Pos. the same like Pos. + Neg.
Answer:
He would gain by choosing air travel if, and only if, he values his time at more than $5 per hour.
Step-by-step explanation:
The problem states that:
A bus ticket from Washington to St. Louis costs $100, while it takes 32 hours to arrive.
A plane ticket from Washington to St. Louis costs $250, while it takes 2 hours to arrive.
Other things constant, Andrew would gain by choosing air travel if, and only if, he values his time at more than
If Andrew choses to go by plane, he saves 32-2 = 30 hours at the expense of $250-$100 = $150.
So, dividing the extra cost by the number of hours saved:

He would gain by choosing air travel if, and only if, he values his time at more than $5 per hour.
Answer:
I think the answer is x≥−34
Step-by-step explanation:
Answer:
24+4x
Step-by-step explanation:
4(6)= 24
4(x)= 4x
Her flight was 9 hours and 20 minutes.
Since 9 A.M. Karachi time is the same as 5 A.M. Warsaw time, we can take the time on her watch, Warsaw time, and subtract 4 to get the Karachi time.
Her watch said she left at 9:40 A.M. This is Warsaw time.
9:40 - 4 = 5:40 Karachi time.
Her flight took from 5:40 A.M. Karachi time to 3:00 P.M. Karachi time. This is 9 hours and 20 minutes.