Answer:
Its B.
Step-by-step explanation:
It said so.
Answer:

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Work Shown:

You could expand terms out and simplify, but I think it's more handy to leave it in this form so you can easily spot the center and radius from a glance.
Answer:
b
Step-by-step explanation:
Answer:
25
Step-by-step explanation:
p=1÷4pir+2r
1÷4×22÷7×7+2(7)
=11cm+14cm
=25
Answer:
y=x+20
Step-by-step explanation: