Step-by-step explanation:
Let x represent the number.
We have 2x + 18 = 3x - 5, therefore x = 23.
The number is 23.
It is already in identity.
cos (x - y) - cos (x + y) = 2 sin(x) sin (y)
Answer:
c. Put them alined straight and centered X to B to W and now you get the answer so it's C.
When you line the object up against the ruler you are measuring it's side, if you put it on the one instead of the zero then you're making the object one inch longer, so you'd have to subtract the one in the end
