Answer:
2(3a-z)
cannot be further simplified
Step-by-step explanation:
Answer:
5 Pull Ups 10 push ups and 15 squats+ if you want 10 jumping jacks.
Step-by-step explanation:
72 chicken and 4ó3 dogs come to 535 animals altogether.
Answer:
Identity is verified.
Step-by-step explanation:
We have to verify the identity 
To prove any identity we always prove one side(either left hand side or right hand side) of the equation equal to the other side.
In this identity we take the left hand side first

(as we know cos(a+b) = cosa×cosb-sina×sinb)


= - sinx ( Right hand side)
Hence identity is proved.