Airplane A takes off and ascends at a rate of 3000 ft/min. At the same time, Airplane B, which is flying at 30,000 ft, begins to descend at a rate of 2500 ft/min.

Let h represent the height off the ground in feet, and let t represent time in minutes.

Which system models this situation?

A.

h = 3000t
h = 2500 + 30,000t

B.

h = 30,000 + 3000t
h = 30,000 − 3000t

C.

h = 2500t
h = 30,000 − 3000t

D.

h = 3000t
h = 30,000 − 2500t

Question

Airplane A takes off and ascends at a rate of 3000 ft/min. At the same time, Airplane B, which is flying at 30,000 ft, begins to descend at a rate of 2500 ft/min.

 

Let h represent the height off the ground in feet, and let t represent time in minutes.

 

Which system models this situation?
	
	
 
A.
	

h = 3000t
h = 2500 + 30,000t
	
 
B.
	

h = 30,000 + 3000t
h = 30,000 − 3000t
	
 
C.
	

h = 2500t
h = 30,000 − 3000t
	
 
D.
	

h = 3000t
h = 30,000 − 2500t

anonymous · Answer

@iGreen

anonymous · Answer

@gerryliyana @waterineyes

igreen · Answer

The first equation is obviously 3000t..so you can eliminate B and C.

anonymous · Answer

yes i think its a

igreen · Answer

The second one is @ 3000, and it's DESCENDING by 2500. So which one do you think it is?

igreen · Answer

A is incorrect..

anonymous · Answer

wait hang on i think i messed up let me check my work

anonymous · Answer

o wow i foregot to make the + sign i made a - will you help me with another?

igreen · Answer

Sure, just close this one..what did you choose for this one?

anonymous · Answer

forgot*

anonymous · Answer

ok

igreen · Answer

So which option did you choose?