What are you confused by?
Answer: A
it's the first option
Step-by-step explanation:
Because when you replace x=30 and then add them together you'll get the values
Answer:
a = 20.79cm ( 2 decimal places)
Step-by-step explanation:
find the length of the identical sides (i name it "x") first using Pythagoras theorem
= 
219.04 = 
= 219.04/2 = 109.52
x = 
now find a,
=
+ 
= 109.52 + 322.7477 = 432.2677
a =
= 20.791048
Answer:
the answer is 21
Step-by-step explanation:
34.7 - (12.07 + 4.9) =
34.7 - 16.97 =
17.73 <===