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3 years ago

Solve 5x + 14 = k for x

Mathematics

1 answer:

Zepler [3.9K]3 years ago

7 0

Answer:

x = 1/5(k-14)

Step-by-step explanation:

5x + 14 = k

Subtract 14 from each side

5x+14-14 = k-14

5x = k-14

Divide by 5

5x/5 = 1/5(k-14)

x = 1/5(k-14)

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-у+25=12у-1 Решите пожалуйста прямо сейчас уравнение

zloy xaker [14]

Answer: 2

Step-by-step explanation:

−y + 25 = 12y − 1

Переместите все члены, содержащие y, в левую часть уравнения

Вычтем 12y из обеих частей уравнения.

−y + 25 − 12y = −1

Вычтем 12y из −y.

−13y + 25 = −1

Переместите все члены, не содержащие y, в правую часть уравнения.

Вычтем 25 из обеих частей уравнения.

−13y = −1 − 25

Вычтем 25 из −1.

−13y = −26

Разделите каждый член на −13 и упростите.

Разделите каждый член в −13y = −26 на −13.

−13y /-13 = -26/-13

Сократить общий множитель −13.

−26 /-13

Разделим −26 на −13.

y = 2

5 0

3 years ago

5. Today, everything at a store is on sale. The store offers a 20% discount.

SVEN [57.7K]

Answer:

Step-by-step explanation:

20% = 20/100 = 0.2

The amount you need to pay for a T shirt is

Cost = original amount(100% - 20%)

Original amount = 18

100% - 20% = 80%

80% = 80 / 100 = 0.8

What this means is that you will pay 80% of the original cost.

Cost = 18*0.8

Cost = $14.40

Part B

Cost = 0.8 * x

Part C

Selling price = 0.8*Original Cost

Selling price = 18

18 = 0.8 * x

18/0.8 = x

x = 22.5

The original price was $22.50

5 0

3 years ago

What is 27a•0=0, please answer it ASAP please

Ilya [14]

That would be the zero property of multiplication which states that any number times zero equals zero

7 0

3 years ago

What should you call a man with a clamp

expeople1 [14]

For the answer to the question above, I think the answer is "A Vise Guy or Vise Man" is what should you call a man with a clamp.

I hope my answer helped. Have a nice day!

3 0

3 years ago

A researcher would like to estimate p, the proportion of U.S. adults who support recognizing civil unions between gay or lesbian

Free_Kalibri [48]

Answer:

$SE = 1.96\cdot \sqrt{\frac{0.50(1-0.50)}{2222} }$

$SE = 1.96\cdot 0.0106 \\\\SE = 0.021\\\\SE = 2.1 \: \%$

The correct option is

Therefore, with a sample size of 2,222, the researcher can be 95% confident that the obtained sample proportion will differ from the true proportion (p) by no more than 2.1%

Step-by-step explanation:

The obtained sample proportion will differ from the true proportion (p) by

$SE = z\cdot \sqrt{\frac{p(1-p)}{n} }$

It is known as standard error or margin of error.

Where p is the sample proportion and n is the sample size.

Since we are not given p then we would assume

p = 0.50

That would maximize the error just to be on the safe side.

The z-score corresponding to 95% confidence level is given by

Level of significance = 1 - 0.95 = 0.05/2 = 0.025

From the z-table, the z-score corresponding to probability of 0.025 is

z-score = 1.96

So the error is

$SE = 1.96\cdot \sqrt{\frac{0.50(1-0.50)}{2222} }$

$SE = 1.96\cdot 0.0106 \\\\SE = 0.021\\\\SE = 2.1 \: \%$

So the correct option is

(c) 2.1%

Therefore, with a sample size of 2,222, the researcher can be 95% confident that the obtained sample proportion will differ from the true proportion (p) by no more than 2.1%

6 0

4 years ago

Solve 5x + 14 = k for x​

Solve 5x + 14 = k for x