The Answer is:
(5a2-3a+8)+(-4a2-1)+(15a+11)
I think it's a rectangle block because the surface is flat on all the sides.
Answer:
Step-by-step explanation:
Jada is making circular invitations
we have d=12 cm, the radius r=6
she needs to find out the circumference
C=2x3.14x r
C=2x 3.14x6=37.68
180/37.68=4.77
she can make just 4 invitations