9x-30 I’m pretty sure!
We are finding the difference, which means subtract! Nine times a number would be 9x and since it’s difference you would subtract it by 30.
Answer:
![[0,2]](https://tex.z-dn.net/?f=%5B0%2C2%5D)
Step-by-step explanation:
A local maximum or local minimum is the point where the tangent drawn to it is parallel to the x axis.
The crest of a wave is local maximum and the trough of wave is local minimum.
Here, in the graph, there are 2 troughs and 1 crest.
The crest is at
. So, the local maximum is at
.
The interval of the local maximum is between
and
.
So, the option that matches with the above interval is
.
Check the picture below.
make sure your calculator is in Degree mode.
Answer
B. a=1, b=-14, c=49