LulaBrazilia wrote:At the rate of m meters per s seconds, how many meters does a cyclist travel in x minutes?
A) m/sx
B) mx/s
C) 60m/sx
D) 60ms/x
E) 60mx/s
Here's the INPUT-OUTPUT approach.
Choose some values that work for m, s and x.
If m = 1 and s = 60, we are saying that the cyclist travels at 1 meter per 60 seconds, which is the same as 1 mile per minute.
Now, let's say the cyclist wants to travel 2 miles (i.e., x = 2)
At a speed of 1 mile per minute, it will take the cyclist
2 minutes to travel 2 miles.
So, when the INPUT is
m = 1, s = 60 and x = 2, the OUTPUT is
2 minutes
Now, we'll plug
m = 1, s = 60 and x = 2 into the answer choices and see which one(s) yields an output of
2
A) m/sx =
(1)/
(60)(2) =
1/120 Nope
B) mx/s =
(1)(2)/
(60) =
1/30 Nope
C) 60m/sx = 60
(1)/
(60)(2) =
1/2 Nope
D) 60ms/x = 60
(1)(60)/
(2) =
1800 Nope
E) 60mx/s = 60
(1)(2)/
(60) =
2 PERFECT!
Answer:
E
Cheers,
Brent
