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3 years ago

Please answer this extremely difficult question - 2+2

Mathematics

2 answers:

Elenna [48]3 years ago

6 0

Answer:

0 the answer is zero

Step-by-step explanation:

add 2 to -2 and you get 0

klasskru [66]3 years ago

6 0

Answer:

Step-by-step explanation:

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Graph: f(x) = -3sin (x/2 - π/4)

charle [14.2K]

This sine function has the form y = f(x) = a sin (bx + c), where |a| is the amplitude, b is the frequency, and c determines the phase shift.

The period of this sine curve is 2 pi/b, or (in this problem) 2 pi/(1/2).

The phase shift of this curve is -c/b, or -(pi/4)/(1/2). Simplify this.

The amplitude is |-3|, or just 3.

Draw a set of coordinate axes. Draw light horizontal lines through y=3 and y=-3. These are the max and min. values of this sine function.

Plot the phase shift on your x-axis.

Your sine function will begin at (phase shift value, 0) and continue for one period. Add the period to the phase shift value. Draw a sine curve beginning and ending at these two x-values.

I encourage you to share your calculations and to sketch the graph described here. Then I could give you more specific feedback on your work. Good luck!

3 0

3 years ago

Find how many numbers greater than 400,000 can be made using all the digits of 416566

Mandarinka [93]

Answer:

Step-by-step explanation:

You have to fill in 6 slots _ _ _ _ _ _.

Since first digit must be 4, there is only 1 way to fill in the 1st slot.

with the 5 slots, we fill in the 6s first, 3 of them.

So we have 5 options and 3 items to fill, (5 choose 3).

Then 2 ways to fill 1 and 1 way to fill 5. (It doesn't matter if you pick 5 or 1 first).

So it becomes (5C3) * (2C1) *(1C1)

= 1 * 5!/(3!)(5-3)! * (2) * 1

= 20

4 0

3 years ago

Whats the x value of -5x - 4y=10

leva [86]

Here is the working and the answer

8 0

3 years ago

I need this answer it’s all algebra (5a-4)-(8a+7b+8)

const2013 [10]

Answer:

-3a-7b-12

Step-by-step explanation:

(5a-4)-(8a+7b+8)

Distribute the minus sign

(5a-4)-8a-7b-8

Combine like terms

5a -8a -7b -4-8

-3a-7b-12

6 0

3 years ago

If a sample of n = 4 scores is obtained from a normal population with µ = 70 and σ = 12. What is the z-score corresponding to a

stellarik [79]

The z-score corresponding to a sample mean of m = 69 is -0.167

In this problem, we have been given :

population mean (μ) = 70, standard deviation (σ) = 12, sample size (n) = 4, sample mean (m) = 69

We know that, the Z-score measures how many standard deviations the measure is from the mean.

Also, the formula when calculating the z-score of a sample with known population standard deviation is:

$Z=\frac{m-\mu}{\frac{\sigma}{\sqrt{n} } }$

where z = standard score

μ = population mean

σ = population standard deviation

m = the sample mean

and $\frac{\sigma}{\sqrt{n} }$ <em> </em>is the Standard Error of the Mean for a Population

First we find the Standard Error of the Mean for a Population

σ /√n

= 12 / √4

= 12 / 2

= 6

So, the z-score would be,

⇒ $Z=\frac{m-\mu}{\frac{\sigma}{\sqrt{n} } }$

⇒ $Z=\frac{69-70}{6 }$

⇒ Z = -1/6

⇒ Z = -0.167

Therefore, the z-score corresponding to a sample mean of m = 69 is -0.167

Learn more about the z-score here:

brainly.com/question/14103836

#SPJ4

5 0

2 years ago