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4 years ago

9

Please Help!!

2 answers:

KonstantinChe [14]4 years ago

7 0

I think the answer is (2,2)

GarryVolchara [31]4 years ago

4 0

Answer:

D:) (2,2,) is the Answer

Step-by-step explanation:

Solve the following system:

{X - 2 Y = -2 | (equation 1)

{3 X - 2 Y = 2 | (equation 2)

Swap equation 1 with equation 2:

{3 X - 2 Y = 2 | (equation 1)

{X - 2 Y = -2 | (equation 2)

Subtract 1/3 × (equation 1) from equation 2:

{3 X - 2 Y = 2 | (equation 1)

{0 X - (4 Y)/3 = (-8)/3 | (equation 2)

Multiply equation 2 by -3/4:

{3 X - 2 Y = 2 | (equation 1)

{0 X+Y = 2 | (equation 2)

Add 2 × (equation 2) to equation 1:

{3 X+0 Y = 6 | (equation 1)

{0 X+Y = 2 | (equation 2)

Divide equation 1 by 3:

{X+0 Y = 2 | (equation 1)

{0 X+Y = 2 | (equation 2)

Collect results:

Answer: {X = 2 , Y = 2

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Select transformations of g(x) = |-2x| + 6 in relation to the parent function.

Aleks [24]

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3 years ago

Is it ever possible that cos (A−B)=cos ⁡A−cos ⁡B? Why

svetlana [45]

Answer:

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Step-by-step explanation:

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3 years ago

The sick days of employees every two years in a company are normally distributed with a population standard deviation of 7 days

Alecsey [184]

Answer:

The 95% confidence interval for the population mean is between 17.93 days and 24.07 days.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find M as such

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$M = 1.96\frac{7}{\sqrt{20}} = 3.07$

The lower end of the interval is the sample mean subtracted by M. So it is 21 - 3.07 = 17.93 days

The upper end of the interval is the sample mean added to M. So it is 21 + 3.07 = 24.07 days

The 95% confidence interval for the population mean is between 17.93 days and 24.07 days.

7 0

3 years ago

Read 2 more answers

How many dollars do you have if you have 90 nickels, 16 dimes, 16 quarters, and 7 fifty-cent pieces? Show your work and explain

aev [14]

Step-by-step explanation:

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16 dimes=16*10=160=160/100=$1.6

16 quarters = 25*16=400=400/100=$4

7 fifty-cent pieces = 7*50=350=350/100=$3.5

Total dollars = 4.5+1.6+4+3.5=$13.6

Explanation : Hope it helps you Kenzee..

just correct me if I'm wrong..

8 0

3 years ago

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Simora [160]

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3 years ago