The answer to this question is C.2 I think
Answer:
17
Step-by-step explanation:
| 9- (- 8) | = | 17 | = 17
Basically the absolute value of N1 - N2
Answer:
4Hz
Step-by-step explanation:
Standard form of a sine or cosine function,
y = acos(b(x+c))
where a is the amplitude, b is the value to find the period. and c is the phase shift.
Period = \frac{2\pi}{b}
From the equation given in the question,
![y = 3cos(8\pi \: t + \frac{\pi}{2} ) \\ y = 3cos(8\pi(t + \frac{1}{16} )) \: \: (factorising \: 8\pi \: out)](https://tex.z-dn.net/?f=y%20%3D%203cos%288%5Cpi%20%5C%3A%20t%20%2B%20%20%5Cfrac%7B%5Cpi%7D%7B2%7D%20%29%20%5C%5C%20y%20%3D%203cos%288%5Cpi%28t%20%2B%20%20%5Cfrac%7B1%7D%7B16%7D%20%29%29%20%5C%3A%20%20%5C%3A%20%28factorising%20%5C%3A%208%5Cpi%20%5C%3A%20out%29)
We can see:
Amplitude = 3,
Period = \frac{2\pi}{8\pi} = 1 / 4
Phase Shift = 1 / 16
Now we want to find the frequency.
Frequency = 1 / Period
= 1 / (1/4)
= 4Hz
Answer: x>-1
x<-3
Step-by-step explanation:
![-2x+3](https://tex.z-dn.net/?f=-2x%2B3%3C5)
subtract 3 on both sides
![-2x](https://tex.z-dn.net/?f=-2x%3C2)
divide -2 on both sides
![x>-1](https://tex.z-dn.net/?f=x%3E-1)
The sign changed because I divided by a negative.
![-4x-3>9](https://tex.z-dn.net/?f=-4x-3%3E9)
add 3 on both sides
![-4x>12](https://tex.z-dn.net/?f=-4x%3E12)
multiply -1 on both sides
![4x](https://tex.z-dn.net/?f=4x%3C-12)
divide 4 on both sides
![x](https://tex.z-dn.net/?f=x%3C-3)
Brainlist please