Answer:
6
Step-by-step explanation:
<em>if</em><em> </em><em>30 = 5w</em>
then 30/5=w=6
<em>-</em><em>tape</em><em> </em><em>diagrams</em><em> </em><em>in</em><em> </em><em>picture-</em>
Answer: -7, -6.5, -6.2, -4.5, 0
I hope this helps, stay safe, and have a great rest of your day. :)
First set up the equation:

Then substitute in known values:

and solve for C

Length * Width = Area
Width = Area / Length
W = 42 / 16.8
W = 2.5 inches