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3 years ago

Amplitude of h(x)=-4sin(2x-7)+3

Mathematics

1 answer:

Verdich [7]3 years ago

4 0

Answer:

Use the form asin(bx−c)+d to find the variables used to find the amplitude, period, phase shift, and vertical shift.

a=−4

b=2

c=7

d=3

Find the amplitude |a| .

Amplitude: 4

Find the period using the formula 2 $\pi$ / |b|.

Find the phase shift using the formula c / b .

Phase Shift: 7/2

List the properties of the trigonometric function.

Amplitude: 4

Period: $\pi$

Phase Shift: 7/2 (7/2 to the right)

Vertical Shift: 3

Step-by-step explanation:

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gulaghasi [49]

$\tan{34^o}= \frac{53}{x} 
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3 years ago

The sum of 8 and joses score is 35 use the variable j yo represent josés score

OLEGan [10]

Answer:

8 + j = 35

subtract 8 from both sides

j = 27

Step-by-step explanation:

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3 years ago

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Lera25 [3.4K]

3 dollars pound because since it is 3/4 you can do: 2.25/3 and get 0.75. Thus means 0.75 is 1/4 a pound. 0.75 x 4 will get you dollars for pound. So 3

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3 years ago

A recent survey based on a random sample of n=470 voters, predicted that independent candidate for the mayoral election will get

julsineya [31]

I have an expression

$\sigma = \sqrt{p(1-p)/n}$

floating around in my head; let's see if it makes sense.

The variance of binary valued random variable b that comes up 1 with probability p (so has mean p) is

$E( (b-p)^2 ) = (-p)^2(1-p) + (1-p)^2p = p(1-p)$

That's for an individual sample. For the observed average we divide by n, and for the standard deviation we take the square root:

$\sigma = \sqrt{p(1-p)/n}$

Plugging in the numbers,

$\sigma = \sqrt{.24(1-.24)/490} = 0.019 = 1.9\%$

One standard deviation of the average is almost 2% so a 27% outcome was 3/1.9 = 1.6 standard deviations from the mean, corresponding to a two sided probability of a bit bigger than 10% of happening by chance.

So this is borderline suspect; most surveys will include a two sigma margin of error, say plus or minus 4 percent here, and the results were within those bounds.

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3 years ago

A 200 foot construction is anchored to the ground by a wire. The wire is fastened to the ground 25 feet from the base of the con

attashe74 [19]

Answer:

Does the question give you any answer choses?

Step-by-step explanation:

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3 years ago