Question

Annette rode her bike 6.8 miles at a constant rate for 90 minutes. To find how fast she traveled, she solved the equation 6.8= x⋅90. What does x represent?

a)The total distance after x minutes
b)Her speed in miles per minute
c)The amount of time it takes to travel 6.8 miles
d)The number of miles she has traveled so far

Answer 1

X represents her speed in miles per minute (b). To find her speed she would divide distance by time. If you divide 6.8 miles by 90 minutes and solve for x you will be finding her speed

Answer 2

x represents Annette speed in miles per minute. Hence, option b) is correct.

Explanation:

Given that Annette rode her bike 6.8 miles at a constant rate for 90 minutes. Also to find how fast she traveled, she solved the equation
`6.8=x* 90`. Now, we have to tell here what x represents.

As,
`Speed=(Distance)/(Time)`

Let speed of bike is x miles/min and given distance is 6.8 miles and at a constant rate for 90 minutes.

∴
`x=(6.8)/(90)`

⇒
`6.8=x* 90`

which is the same equation as given.

Here x represents Annette speed in miles per minute. Hence, option b) is correct.