Answer:
its the second one -3(x-y)
Answer:
4.5cm
Step-by-step explanation:
Circumference = 2
r
28.3=2
r
28.3/2
=r
4.456
<u>Step-by-step explanation:</u>
To prove:

Identities used:
......(1)
........(2)
.......(3)
Taking the LHS:

Using identity 1:

Using identities 2 and 3:

As, LHS = RHS
Hence proved
172.2 it correct because u have use you brain and u will get the answer u have to try first and put your mind to it when u do that then u will be able to do anything