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3 years ago

Help!!!!!!!!! Please!!!!

Mathematics

1 answer:

Sedaia [141]3 years ago

6 0

your answer is letter A,

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What is the amplitude, period, and phase shift of f(x) = -4 sin(2x + π) - 5?

son4ous [18]

F(x) = -4sin(2x + π) - 5

Amplitude
A = -π

Period
2π = 2π = π
B 2

Phase Shift
-C = -π = ≈ 1.57
 B 2

3 0

2 years ago

Read 2 more answers

I need help with this problem

Arada [10]

Answer:

65.56°

Step-by-step explanation:

We know that if we take dot product of two vectors then it is equal to the product of magnitudes of the vectors and cosine of the angle between them

That is let p and q be any two vectors and A be the angle between them

So, p·q=|p|*|q|*cosA

⇒ $cosA=\frac{u.v}{|u||v|}$

Given u=-8i-3j and v=-8i+8j

$|u|=\sqrt{(-8)^{2}+ (-3)^{2}} =8.544$

$|v|=\sqrt{(-8)^{2}+ (8)^{2}} =11.3137$

let A be angle before u and v

therefore, $cosA=\frac{u.v}{|u||v|}=\frac{(-8)*(-8)+(-3)*(8)}{8.544*11.3137} =\frac{40}{96.664}$

⇒ $A=arccos(\frac{40}{96.664} )=arccos(0.4138 )=65.56$

Therefore angle between u and v is 65.56°

5 0

2 years ago

Please help me. I need to find what W is

cluponka [151]

Answer:

Step-by-step explanation:

w+13- $\frac{2w}{3}$ =16

w · $\frac{3}{3}$ - $\frac{2w}{3}$ +13=16

$\frac{w}{3}$ +13=16

$\frac{w}{3}$ =3

w=9

6 0

2 years ago

x varies jointly with the square of y and z. when y=6 and z=5, x=100. Then, what is x when y=8 and z=2?

djyliett [7]

X = k*y^2 * z
100 = 6^2*5*k,
k=0.555
x=0.555zy^2

x=o.555(8^2)(2)=71.1112.

Hope that helps!

8 0

3 years ago

What are square numbers

Degger [83]

Square numbers are numbers with an odd number of factors. For example, 1 and 4 are square numbers.

3 0

3 years ago