The nearest hundred would be 400
Answer:
(-1) degrees
Step-by-step explanation:
∵ Temperature drop with the increase in every 1000 ft of height = 2 degrees
∴ Temperature drop in every 1 ft =
degrees
∴ Temperature drop in 29000 ft = 
= 58 degrees
Temperature on ground = 57 degrees
Temperature at 29000 feet = 57 - 58
= -1 degrees
Therefore, temperature at 29000 feet is -1 degrees.
Answer:
Hm? Is there meant to be a file, if so I can’t see it. :((
Step-by-step explanation:
Then you don’t get lost doing the problem
Answer:
Only one solution 
Step-by-step explanation:

Multiply equation
by 

Now from equation 
equation

Put the value in equation 

hence only one solution exists
.