Help Needed:

Eduardo’s average speed on his commute to work was 55 miles per hour. On the way home, he hit traffic and only averaged 40 miles per hour. If the round trip took him 1.25 hours, which expression represents the distance, in miles, for his trip home that is missing from the table?

(Will give medal)

Question

Help Needed:

Eduardo’s average speed on his commute to work was 55 miles per hour. On the way home, he hit traffic and only averaged 40 miles per hour. If the round trip took him 1.25 hours, which expression represents the distance, in miles, for his trip home that is missing from the table?

(Will give medal)

anonymous · Answer

attachment

anonymous · Answer

To see the problem better, see the attachment.

usukidoll · Answer

given - 55 mph to commute to work
            40 mph to commute to home
             a round trip is 1.25 hours

usukidoll · Answer

so what happened to the speed?
@Roman532

anonymous · Answer

Why it decreased?

usukidoll · Answer

yes it decreased due to traffic...
is the math symbol for decrease + or -?

anonymous · Answer

- ?

usukidoll · Answer

yes because decrease means going down.. 
decrease in speed means going slow

usukidoll · Answer

the formula is 
distance = rate x time

usukidoll · Answer

we are given that the rate to commute to home is is 40
distance =40 x ?

anonymous · Answer

So I'm guessing that narrows it to C or D?

usukidoll · Answer

yeah... I'm thinking that the variable for time goes first

what happened to the time? If it took 1.25 and speed went down from 55 mph to 40 mph...

anonymous · Answer

He hit traffic... And I'm guessing the answer is D?

usukidoll · Answer

we are given that  a round trip took 1.25 hours and the speed decreased from 55 mph to 40 mph.

anonymous · Answer

Now that I look at it...

usukidoll · Answer

so our time has to be t-1.25 because he hit traffic and his speed decreased

usukidoll · Answer

distance = rate x time
distance = 40 (t-1.25)

usukidoll · Answer

the reason why it's not the first two choices is that it neglected the rate

anonymous · Answer

Right because it has to be rate x time

usukidoll · Answer

mhm :)

usukidoll · Answer

not sure if order matters.. I'm assuming the variable goes first.. it's been over a decade since I've done those problems and I end up just guessing when I first did them... but I read it through carefully finding out what's given and what do I need to translate in math terms

anonymous · Answer

yeah I'm having a hard time deciding whether it's C or D

usukidoll · Answer

do you have unlimited tries?

anonymous · Answer

I get 3 tries, 2 left. It's a quiz I must pass. I'm going with C because it makes sense to x 40 and 1.25 and then subtract the hours

usukidoll · Answer

these problems don't surface at all in higher level Math lol. I think these problems are meant to torture young students.

anonymous · Answer

Haha I just hate Algebra and Calculus, I'm not going to be some rocket scientist when older so I really do not need it, basically pointless. Busy work.

usukidoll · Answer

:S I'm looking at similar examples... the variable does go first.

anonymous · Answer

Should I change my answer? I chose C

usukidoll · Answer

did you submit it?

anonymous · Answer

Not yet just keeping note of this problem for the next quiz re-take

anonymous · Answer

@UsukiDoll

usukidoll · Answer

yes?

anonymous · Answer

Nevermind actually, I'll leave my answer as C

anonymous · Answer

Thanks for the help