If if y=6 and z=1 then the equation would be 1+6(2) and that ends up to be 13

Given the Mean Age of Five Children = 12

⇒ Total Age of the Chidren = 12 × 5 = 60 Years
Option 1.
sin(2x) = 2sin(x)cos(x)
cos(2x) = 1 - 2sin(x)^2
Answer:
-2 is greater than -2 1/2
Step-by-step explanation:
All the other questions are false and only answer a is correct because -2 is closer to 0 than -2 1/2.