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2 years ago

Use a system of linear equations with two variables and two equations to solve. A number is 9 more than another number. Twice

Mathematics

1 answer:

Troyanec [42]2 years ago

4 0

9514 1404 393

Answer:

(x, y) = (3, 12)

Step-by-step explanation:

Using the given variable definitions, we can write the equations ...

y = x + 9

2(x +y) = 30

Solving the second equation for y, we have ...

y = 15 -x

Substituting this into the first equation gives ...

15 -x = x +9

6 = 2x . . . . . . . . . add x-9

3 = x . . . . . . . . . . divide by 2

y = 3+9 = 12 . . . . substitute into the first equation

The numbers are (x, y) = (3, 12).

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A beekeeper pours honey into jars. Each large jar holds 18 ounces of honey. Each small jar holds 12 ounces of honey. The beekeep

viktelen [127]

Answer:

1,100 ounces because 20 × 30 + 10 × 50 = 1,100

Step-by-step explanation:

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3 years ago

Let a population consist of the values cigarettes, cigarettes, and cigarettes smoked in a day. Show that when samples of size

Katen [24]

The "sample" with "mean absolute deviation" indicate about a sample mean absolute deviation is being used as an estimator of the mean absolute deviation of a population

Mean of the sample MAD=3.3
Population MAD =6.4

<h3>What does this indicate about a sample mean absolute deviation used as an estimator of the mean absolute deviation of a population?</h3>

Generally, The MAD measures the average dispersion around the mean of a given data collection.

$1/n \sum_i-1^{n} |x_i -m(X)|$

In conclusion, for the corresponding same to mean

the sample mean absolute deviation

7,7 ↔ 0

7,21 ↔ 7

7,22 ↔ 7.5

21,7 ↔ 7

21,21 ↔ 0

21,22 ↔ 0.5

22,7 ↔ 7.5

Therefore

Mean of the sample MAD=3.3
Population MAD =6.4

Read more about mean absolute deviation

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5 0

2 years ago

Mrs . Porcelli’s classroom bulletin board is 2/1/4 feet long. Ms .Smith bulletin board is 3 times as long Mrs . Porcelli’s.How l

snow_lady [41]

Answer:

$6\frac{3}{4}\ ft$

Step-by-step explanation:

we know that

To find out how long is Ms.Smith’s bulletin board, multiply Mrs . Porcelli’s bulletin board by 3

$2\frac{1}{4}(3)$

but first convert mixed number to an improper fraction

$2\frac{1}{4}\ ft=2+\frac{1}{4}=\frac{9}{4}\ ft$

substitute

$\frac{9}{4}(3)=\frac{27}{4}\ ft$

convert to mixed number

$\frac{27}{4}\ ft=\frac{24}{4}+\frac{3}{4}=6\frac{3}{4}\ ft$

3 0

3 years ago

What is heavier 85 g or 3 oz

kati45 [8]

To compare measurements of different units, it is necessary to convert one to the form of the other. Let us try to convert 85g to ounces using the following relation: 1g = 0.035274 oz

85g * (0.035274oz / 1g) = 2.99829 oz.

Therefore, 3 oz is heavier than 85 g.

8 0

3 years ago

Find a number that is between 8/11 and 0.85(repeating) .

professor190 [17]

The answer is C. If you have any questions then leave a comment. Good luck!

7 0

3 years ago