Mr. and Mrs. Miller both get in their cars and begin to drive at the same time. Mr. Miller is 280 mi from their house and drives directly home at a constant rate of 40 mph. Mrs. Miller is at their house and drives away from the house at a constant rate of 30 mph.

Let d represent distance from home, and let t represent time in hours.

Which system models this situation?

a.
d = 280 + 40t
d = 30t

b. d = 280 − 30t
d = 40t

c.d = 280 − 40t
d = 30t

d.
d = 280 − 40t
d = 280 + 30t

Question

Mr. and Mrs. Miller both get in their cars and begin to drive at the same time. Mr. Miller is 280 mi from their house and drives directly home at a constant rate of 40 mph. Mrs. Miller is at their house and drives away from the house at a constant rate of 30 mph.
 
Let d represent distance from home, and let t represent time in hours.
 
Which system models this situation?



a.	
d = 280 + 40t
d = 30t


b.  d = 280 − 30t
d = 40t

c.d = 280 − 40t
d = 30t

d.  	
d = 280 − 40t
d = 280 + 30t

coconutjj · Answer

We know Mrs Miller must have a increasing distance from her house, in order to get distance we use speed x time. Thus it must be 30t

coconutjj · Answer

This condition rules out choice b and d, because they do not include 30t

anonymous · Answer

c?

coconutjj · Answer

Now since Mr.Miller is driving back home, his distance decreases by 40 miles every hours

anonymous · Answer

so it is C ?

coconutjj · Answer

yes

anonymous · Answer

thanksss coconut lol i might have more questions

coconutjj · Answer

u Welcome