Sin(a+b) + sin (a-b) = 2 sin a cos b

verify the identitiy

In the film, zeke the zombie slayer versus the zombies from space, zeke slayed 140 zombies. in the sequel, zeke the zombie slayer versus the zombies from space, part 2, he slayed 5% more zombies. how many zombies were slain by zeke in the sequel?

What is the inverse of the function f(x) = 2x + 1?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1