Answer:
7y²
Step-by-step explanation:
First u group them like 4+3+y+y=7y²
10
Multiply 4 by 2.5 to get 10
No
You cant have 2 y values
Circumference of a circle is 2piR
C=2piR and R=10
C=2(3.14)(10)
So the circumference is 62.8 cm