Answer:
I think it C
Step-by-step explanation:
Mark me as Brainliest Sorry if it's wrong
Answer:
That is the solutions are:
,
Step-by-step explanation:
The period of
or
is
.
Let's look at the first rotation to see when
happens.
This happens at
and also at
. (Notice I just looked at the x-coordinates because that is what cosine is. Sine is the y-coordinate.)
Now to find the rest of the solutions we can just make full rotations either way to get back to those points .
That is the solutions are:


Answer: <em>is it 4, maybe?</em>
20 * 0.15 = $3 discount
20 - 3 = $17
Solution: the meal is $17
Divide each term by 3.5 to get x=4.