Answer:
π = 2A/ r²
Step-by-step explanation:

Answer:
a=18
Step-by-step explanation:
-2a-10+a=-28
-1a-10=-28
+10 +10
-1a=-18
divide by -1
a=18
46
When it says f(4) that means x=4
So you then just fill in all the x’s with 4’s and solve as normal
Answer:
245.76
Step-by-step explanation: