1: a. 5 hours
b. 50 mph
2: Expressions have solutions and equations don't
Question 1:
a.
If r is the miles per hour, that means that
r
would be 80.
Plug 80 into your equation and solve for
T
.
T
=400/80
T
=5
And there you go! It will take
5 hours
to travel 400 miles going 80 mph.
b. Same thing as before but instead replace the
T
with 8 and leave the
r
alone.
8=400/
r
Rearrange and get 400/8=
r
50=
r
So, if it takes you 8 hours to travel 400 miles, you were going an average of
50 mph
.
Question 2:
"Expressions have solutions and equations don't" is
false
.
Thank you for letting me help you! I'ma get off now.