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Mars2501 [29]
2 years ago
8

Plss help me in this

Mathematics
2 answers:
Alla [95]2 years ago
8 0

Answer: Hello, my name is woods 245. And I'm here to answer your question.

So what do you need with and I will help you with it.

Step-by-step explanation:

Elan Coil [88]2 years ago
3 0

Answer:

3+\sqrt{3} , 5\sqrt{5}, 2\sqrt{2}, and 18 -2\sqrt{2}

Step-by-Step Explanation:

1)

\sqrt{3}(\sqrt{3}+1)

Distribute the square root:

\sqrt{9}+\sqrt{3}

3+\sqrt{3}

2)

(\sqrt{5} )(\sqrt{5} )(\sqrt{5} )

\sqrt{(5)(5)(5)}

\sqrt{(25)(5)}

(\sqrt{25}) (\sqrt{5)}

5\sqrt{5}

3)

(\sqrt{2} )(\sqrt{2} )(\sqrt{2} )

\sqrt{(2)(2)(2)}

\sqrt{(4)(2)}

(\sqrt{4}) (\sqrt{2)}

2\sqrt{2}

4)

(3\sqrt{2})^{2} -2\sqrt{2}

(9)(2) -2\sqrt{2}

18 -2\sqrt{2}

If you need it factored:

2(9-\sqrt{2})

Keep in mind that square roots can be positive<em> or</em> negative.

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The answer is the letter B
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A local television station runs 2.5 minutes of commercials during every 30 minutes of programming. At this rate, how many minute
umka21 [38]

Answer:

12.5 minutes of commercials

Step-by-step explanation:

9:30 - 7:00 = 2 and a half hours on air = 150 minutes.

150 / 30 = 5

5 x 2.5 = 12.5

8 0
2 years ago
Read 2 more answers
A paint manufacturer uses a machine to fill gallon cans with paint​ (1 galequals128 ​ounces). The manufacturer wants to estimate
kvasek [131]

Answer:

a) To determine the minimum sample size we need to use the formula shown in the picture 1.

E is the margin of error, which is the distance from the limits to the middle (the mean) of the confidence interval. This means that we have to divide the range of the interval by 2 to find this distance.

E = 0.5/2 = 0.25

Now we apply the formula

n = (1.645*0.80/0.25)^2 = 27.7 = 28

The minimum sample size would be 28.

b) To answer the question we are going to make a 90% confidence interval. The formula is:

(μ - E, μ + E)

μ is the mean which is 127. The formula for E is shown in the picture.

E = 0.80*1.645/√8 = 0.47

(126.5, 127.5)

This means that the true mean is going to be contained in this interval 90% of the time. This is why it doesn't seem possible that the population mean is exactly 128.

7 0
3 years ago
Is the point (1, -3) a solution to the system? Show all work
Studentka2010 [4]

Answer:

The point P(1,-3) is not a solution to the system.

Step-by-step explanation:

Given  \left \{ {{y-x+2}} \right.  

Let a point be P(1,-3)

Here x = 1 ; y = -3

Substituting the values of x,y in the function

\left \{ {{y-x+2}} \right.

For y<x-1

-3 < 1-1

-3<0 (True)

now for,

y>-x+2

-3 > -1 + 2

-3 > 1 (False)

Hence the point is not a solution to the system.

6 0
2 years ago
Find the missing coordinates y+7x=1<br><br> (-1, )<br> (4, )
Pachacha [2.7K]

Answer:

(-1,8)

(4,-27)

Step-by-step explanation:

y+7x=1

Let x = -1 and find y

y+7(-1)=1

y -7 =1

Add 7 to each side

y-7+7 = 1+7

y = 8

(-1,8)

Let x = 4 and find y

y+7(4)=1

y +28 =1

Subtract 28 from each side

y+28-28 = 1-28

y = -27

(4,-27)

6 0
2 years ago
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