First, change everything into minutes.
12 noon is 12 by 60 which = 720 minutes.
9am is 9 by 12 which = 540 minutes.
X is now your number of minutes before noon.So noon - x is the next step:
720 - x
20 minutes ago it was 720 - x - 20
720 - x - 20= 540 + 3x (3x because you're looking for 3 times as many minutes)
720 - 20 - 540=4x (you combine all the like numbers and variables)
160 = 4x
160/4= x
40 = x
Your answer is 40 minutes
<span>
</span>
Answer:
A: 180°, semi circle
Step-by-step explanation:
We are told that MK and HL are the diameters.
By Inspection, it is clear that MHK will be a semi circle.
The angle of that chord will be 180° since sum of angles on a straight line is 180°.
Answer is option A
Where a is the amplitude
b is used to find the period
The phase shift can be fined by doing
then the midline is y=d.
Finding A: The amplitude is the half of the distance between the. y values of the max and the min.
So a=2.5
Note: A is Positve never negative so if you get a negative a, take the absolute value.
Period:
Find the distance between x values,
The distance between the x values of the max and min x values is half the distance of the period. So the period is 6.
Note : If b is negative, take the absolute value.
Finding the midline.
To find the midline find the midpoint of the max and min y values.
So our midline is
So as of right now, our trig formula is
Plug in any x or y value,
This is not right so we need to shift this to the nearest value that is right
If we subtract,
We will have a cosine value of 1.
So our phase shift is
Our phase shift would be 2 units to the right.