Step-by-step explanation:
3
???
is that really the answer you are looking for ? there are infinite possibilities.
Let
x -----> the number
we know that
The algebraic expression of the problem is giving by
x^2 -----> square a number
then
square root of the result
so
![\sqrt{x^2}=x](https://tex.z-dn.net/?f=%5Csqrt%7Bx%5E2%7D%3Dx)
therefore
The final result is the same original number
D=vt
So they will travel downstream and upstream the same distance. Downstream they will travel:
d=(2+18)t1
Upstream they will travel:
u=(18-2)t2
Since d=u we can say:
20t1=16t2
We are told the trip lasts 3 hours so t1+t2=3, t2=3-t1, using this in the equation above we have:
20t1=16(3-t1)
20t1=48-16t1
36t1=48
t1=4/3 hours, and from earlier we saw that d=20t1 so:
d=20*4/3
d=80/3 miles
d=26 2/3 miles.