Answer:
1 .i think it is d
Step-by-step explanation:
Cos9x - cos5x = -2sin2x.sin7x
sin17x - sin3x = 2sin7x.cos10x
so f(x) =
=
X=# of weeks passed
150+2X=195-X
3X=45
X=15
A)15 weeks
B)180 pounds
For a cube,
The volume is the cube of the side length.
To raise a product to an exponent, raise each factor to the exponent.
To raise a power to a power, multiply powers.
B) At a restaurant, William and eight friends divided the bill evenly. If each person paid $10.20, what was the total bill?