Semicircle perimiter=1/2circumferece+diameteter
diameter=2r
c=2pir
so 1/2circumference=1/2(2pir)=pir
d/2=r
given
d=30
d/2=30/2=15=r
perimiter=pir+d
perimiter=15pi+30
aprox
perimiter=77.1239
total cost=cost per foot times feet
total cost=9.25 times 77.1239
total cost=713.396
it will cost $713.40
Answer:
The first one cannot be simplified
reason: usually when simplifying an expression you combine like terms but in the given expression there are no like terms
An example of like terms would be 6a and 9a
Essentially what i am saying is that the variables have to be the same in order for them to be combined
The second one is 36r
This is the answer because they tried to combine like terms that aren't similar
r and f are not the same variable therefore they cannot be combined
Hope this helps :)
Answer:12
Step-by-step explanation:
