Answer:
the perimeter of the book cover is 504
:)
Step-by-step explanation:
Angles in a pentagon add to 540 degrees.
100+80+160+91+x =540
431+x=540
109=x
Hope this helps!
14z+29y^3
14z+12y^3+10y^3+7y^3
Combine like terms
7y-6y-10=13
7y-6y = y
y-10=13
add 10 to both sides
y = 23
So What's Your Question Dear........