6X + 8Y - 4Z = 5 1X + 2Y + 5Z = 9 9X - 3Y + 3Z = 6 resolverlo por metodo de Gauss jordan

Answer:

Step-by-step explanation:

Given expression:

Answer options for equivalent expression:

A. (2x - 1)(x + 4)= 2x² + 8x - x - 4 = 2x² + 7x - 4

B. (2x + 1)(x - 4) = 2x² - 8x + x - 4 = 2x² - 7x - 4

C. (2x + 1)(x + 4) = 2x² + 8x + x + 4 = 2x² + 9x + 4

D. None of these​

Answer:

142,200,000

Step-by-step explanation:

Used Calculator

Answer:

142200000

Step-by-step explanation:

It's a really long answer

Answer:

She read 277 pages during the second week.

Step-by-step explanation:

215 + 62.

Answer: she read 277 books

Step-by-step explanation:

Answer:

19 quarts

Step-by-step explanation:

you change the measurements to quarts.

Complete question is;

On a given day, the proportion of workers from Company B who purchase a coffee from the company cafeteria is 0.62 and the proportion of workers from Company C who purchase a coffee from the company cafeteria is 0.71. A random sample of 40 workers was selected from Company B and another random sample of 40 workers was selected from Company C. The proportion of workers from Company B who purchased coffee was p^_B = 0.70 and the proportion of workers from Company C who purchased coffee was p^_C = 0.75.

What is the correct unit of measurement for the mean of the sampling distribution p^_B - p^_C?

A) Days

B) Dollars

C) Companies

D) Workers

E) There are no units associated with the mean of the sampling distribution

Answer:

E) There are no units associated with the mean of the sampling distribution

Step-by-step explanation:

We are given;

Population proportion for workers from Company B who purchase a coffee from the company cafeteria as 0.62

Population proportion for workers from Company C who purchase a coffee from the company cafeteria as 0.71

Now, we were told that a random sample of 40 each were selected from both company B & C and the sample proportion were;

p^_B = 0.70 and p^_C = 0.75

Now, this proportions don't have any units as it is based on a ratio of the number of people that purchased coffee to the number of people surveyed.

Thus we can conclude that p^_B - p^_C will not have any units associated with it.

The possible outcomes of the difference in proportions of the two samples

based on on the individual proportions are not associated with a unit.

Reasons:

The given parameters are;

The proportion of workers of Company B who purchase coffee from the

Company B workers that purchase coffee from the cafeteria = 0.62

Company A workers that purchase coffee from the cafeteria = 0.71

Number of workers in the sample from Company B = 40

Number of workers in the sample from Company A = 40

Proportion of Company B workers who purchase coffee, [tex]\hat p_B[/tex] = 0.71

Proportion of Company C workers who purchase coffee, [tex]\hat p_C[/tex] = 0.75

Required:

The unit of the mean of the sampling distribution of [tex]\mathbf{\hat p_B - \hat p_C}[/tex]

Solution:

The proportion of the workers that purchase coffee is given by the ratio of the number of workers that purchase coffee to the number of workers in the sample.

Therefore;

[tex]\displaystyle \hat p = \mathbf{\frac{Coffee \ buying \ workers}{Total \ number \ of \ workers}}[/tex]

Given that the unit of the numerator and denominator are both workers,

that divide out, we have that the [tex]\mathbf{\hat p}[/tex], [tex]\mathbf{\hat p_B}[/tex], [tex]\mathbf{\hat p_C}[/tex] and therefore [tex]\hat p_B - \hat p_C[/tex] are not

associated with a unit.

Therefore;

The correct option is; E. There are no units associated with the mean of the sampling distribution.

Learn more here about sampling distribution of a sample proportion here:

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Two decimals with a product close to 6.3 are, 2.5 and 2.52

To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.

Given that;

To find Two decimals with a product close to 6.3.

Now, Let one decimal number is, 2.5

Hence, Second number is,

⇒ 6.3 / 2.5

⇒ 2.52

Hence, Two decimals with a product close to 6.3 are, 2.5 and 2.52

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Answer:

21.72% is correct answer

Answer:

18.4

Step-by-step explanation:

Answer:

yes

Step-by-step explanation:

not sure how to explain it's kinda hard sorry

Answer:

Yes

Step-by-step explanation:

Answer:

Part a)

MN = 0.5a-0.5c

Part b)

MN=0.5a-0.5c

CA=a-c

CA is parallel to MN because 2×MN = CA.

Step-by-step explanation:

Part a = We know that ABCD is a parallelogram (stated), thus opposite sides must be equal. So given that DA = a, CB = a, DC = c, AB = C.

MN = MB+BN, so as M is the midpoint of CB then MB = 1/2 a and as we are going against AB (we are doing BN) then it will be -0.5c as N is the midpoint of AB.

Part B= More of a mathswatch error, where you have to quite literally put the precise answer. CA = CD+DA so -c (as we are going the opposite way to DC) + a.

CA = -c+a

Now CA is a multiple of MN. But Mathswatch prefers if you say that CA is parallel to MN because MN times 2 is equal to CA

In this exercise we have to use the knowledge of parallelogram and vectors to give the values ​​of each one of them, like this:

A) MN = 0.5a-0.5c

B)CA is parallel to MN because 2×MN = CA.

First, we have to remember the definition of parallelogram:

A) We know that ABCD is a parallelogram, thus opposite sides must be equal. So given that:

[tex]DA = a,\\CB = a, \\DC = c, \\AB = C.[/tex]

[tex]MN = MB+BN\\MB = 1/2\\BN=-0.5c\\MN = 0.5a-0.5c[/tex]

B)Where you have to quite literally put the precise answer, so we have that:

[tex]CA = CD+DA \\CD=-c\\DA=a\\CA = -c+a\\[/tex]

See more about parallelogram at brainly.com/question/555467

Answer:

The answer is A, B, C, D, E

ALL OF THEM ARE CORRECT!!!

Step-by-step explanation:

Answer:

95?

Step-by-step explanation:

Answer:

71.58

Step-by-step explanation:

Answer:

The smallest number of chocolates in the box is 124.

Step-by-step explanation:

There are always 4 bars of chocolates left in the box when they are share equally among 8, 10, or 12 children.

This means that the smallest number of chocolates in the box is 4 added to the least common multiple of 8, 10 and 12.

LCM(8,10,12).

We factore them by prime factors until all are 1. So

8 - 10 - 12|2

4 - 5 - 6|2

2 - 5 - 3|2

1 - 5 - 3|3

1 - 5 - 1|5

1 - 1 - 1

So

lcm(8,10,12) = 2*2*2*3*5 = 8*15 = 120

Adding 4: 120 + 4 = 124

The smallest number of chocolates in the box is 124.

Answer:

6.79

Step-by-step explanation:

First of all, you will have to know how much is 3% of 7 in order to decrease it by that amount.

7 x 0.03 = 0.21

Now that you know the amount, you can subtract it from seven and therefore you have decreased 7 by 3%.

7 - 0.21 = 6.79

Answer:

Percentage decrease = 7 × 3%

7 - Percentage decrease = 7-(3% x 7)= 7 - 3% x 7=7 x (1 - 3%)= (100% - 3%) × 7 = 97% x 7 = 679%

hello lol srry I don't know what to do

The customer's claim is incorrect because the value of the number of baskets are in decimal.

A system of equations is a set or collection of equations that you deal with all together at once. For a system to have a unique solution, the number of equations must equal the number of unknowns.

For the given situation,

Let the number of small baskets be x

and the number of large baskets be y

Price of small basket = $3 per basket

Price of large basket = $5 per basket

Number of baskets purchased by customer = $45

The system of equations for the above statements are

[tex]x+y=10[/tex] ------ (1)

[tex]3x+5y=45[/tex] ------ (2)

From 1, [tex]x=10-y[/tex]

Now, substitute x in equation 2,

⇒ [tex]3(10-y)+5y=45[/tex]

⇒ [tex]30-3y+5y=45[/tex]

⇒ [tex]2y=45-30[/tex]

⇒ [tex]2y=15[/tex]

⇒ [tex]y=\frac{15}{2}[/tex]

⇒ [tex]y=7.5[/tex]

Substitute the value of y in equation 1, we get

⇒ [tex]x=10-7.5[/tex]

⇒ [tex]x=2.5[/tex]

Only whole numbers of baskets may be purchased. But the value of x and y are in decimals.

Hence we can conclude that the customer's claim is incorrect because the value of the number of baskets are in decimal.

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Answer:

$2690.28

Step-by-step explanation:

2862 decrease 6% =

2862 × (1 - 6%) = 2862 × (1 - 0.06) = 2690.28

Answer:

2700

Step-by-step explanation:

106%-> 2862

100%->2700

Answer:

(3,7) (2,-1)

(y1,Y2K)(z1,z2)

(y2-y1)(z2-z1)

(7_3)(-1-2)

(4)(-3)

=-12

Answer:

in previous material it was shown that the digit sum of the product of two integers is equal to the digit sum of the product of the digit ... For instance, 66/8 = 8.25. ... For example, 35/7=5; the digit sum of the quotient is 5 and the digit sum of 35 is 8.

Missing: 59.4 ‎| Must include: 59.4

Answer:

7.2

Step-by-step explanation:

Change the divisor 8.25 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

5940 ÷ 825 = 7.200

and therefore:

59.4 ÷ 8.25 = 7.200

Both calculated to 3 decimal places.

Answer:

[tex] - 20x - 6 = 36x + 4 \\ 36x + 20x = - 6 - 4 \\ 56x = - 10 \\ x = \frac{ - 10}{56} \\ x = - 0.17571428[/tex]

Answer:

B 4x^2-16

Step-by-step explanation:

The answer is 4x^2-16

Answer:

4x^2-16

hope it's helpful ❤❤❤❤

THANK YOU.

Answer:

its B

Step-by-step explanation:

Answer: D. x=9√3; y=18

Step-by-step explanation:

This is a 30-60-90 special triangle, where we can use the rules to find the value of x and y. (For specific explanation, please look at the attachment below)

-----------------------------------------------------------------------------------------------------

X value

- The shortest side of the triangle that corresponds with [x] is 9 units. This is because it is half of the larger triangle's side length.

- Using the rules, the shortest side is x, then the second short side is x√3

- Substitute value in= x√3=(9)√3=9√3

Y value

- The shortest side of the triangle that corresponds with [x] is 9 units. This is because it is half of the larger triangle's side length.

- Using the rules, the shortest side is x, then the longest side is 2x

- Substitute value in= 2x=2(9)=18

Hope this helps!! :)

Please let me know if you have any questions

Answer:

Step-by-step explanation:

Coupon A

Unit price of fresh buns = [tex]\frac{\text{Total price}}{\text{Number of buns in a pack}}[/tex]

                                        = [tex]\frac{3.24}{12}[/tex]

Unit Price = $0.27 per bun

Coupon B

Units price of fresh buns = [tex]\frac{4.5}{18}[/tex]

Unit Price = $0.25 per bun

Coupon with the better buy is Coupon B.

Coupon C

Unit price of hamburger meat = [tex]\frac{\text{Price}}{\text{Quantity}}[/tex]

                                                  = [tex]\frac{5.44}{16}[/tex]

                                                  = $0.34 per hamburger

Coupon D

Unit price = [tex]\frac{9.6}{24}[/tex]

                = $0.40 per hamburger

Coupon with better buy is Coupon C.

"Answer" and Explanation:

All I can tell is that x=60, and that the angle is also 60, since it is and equalateral triangle.  I can't see anything about sides lengths nor can I tell what 'side' means, so yeah that's all I can say.  Sorry that probably didn't help at all.  

Answer:The door mesures 96 inches in length and 36 inches in width

if u need a explenation you can ask me

Answer:

15/2

Step-by-step explanation:

5/1 * 3/2 = 15/2

Answer:

A, Histograms give values where as dot plots are focused on a trend.

Answer:

B

Step-by-step explanation:

I got the test