Answer:
[tex]69y+23[/tex]
Step-by-step explanation:
The area of a rectangle will always be length times width or width times length, doesn't matter which way.
In this case, the width is [tex]3y+1[/tex] miles and the length is [tex]23[/tex] miles. So, the area is [tex]23(3y+1)=23*3*y+23*1=69*y+23[/tex].
So, the area is [tex]\boxed{69y+23}[/tex] and we're done.
