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valkas [14]
4 years ago
9

X - y = 6x = y + 2Solve the system of equations by substitution.

Mathematics
1 answer:
worty [1.4K]4 years ago
6 0

Answer:

No Solution.

Step-by-step explanation:

x-y=6

x=y+2

y+2-y=6

2=6

no solution

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Answer:

Slope is - 2 because The slope-intercept form is y=mx+b where m is the slope value. In the equation y=-2x , the m value is - 2 .

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Which of the following is a feature of a credit card?
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The temperature changed from 5C at 6 p.m. to -2C at midnight. How much did the temperature decrease?
Dmitry_Shevchenko [17]
Salutations!

The temperature changed from 5°C at 6 p.m. to -2°C at midnight. How much did the temperature decrease?

Lets solve this!

To find out how much the temperature is decreased, you need to subtract 5°°C from -2° C. from . 

Lets form this into statements ---

Temperature at 6 PM = 5°C

Temperature at midnight = -2°C.

Temperature decreased = 5°C - 2°C = 3° C.

3°C is the temperature decreased. 

Hope I helped (:

Have a great day!
7 0
3 years ago
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I need help with this step by step
damaskus [11]
0.3x ≥ 0.6
Divide both sides by 0.3,
0.3x / 0.3 ≥ 0.6/0.3
x ≥ 2

So, your final answer is x ≥ 2

Hope this helps!
6 0
3 years ago
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proporti
kenny6666 [7]

Answer:

A sample size of 474 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

Based on previous evidence, you believe the population proportion is approximately 73%.

This means that \pi = 0.73

95% confidence level

So \alpha = 0.05, z is the value of Z that has a p-value of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

How large of a sample size is required?

A sample size of n is required, and n is found when M = 0.04. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.04 = 1.96\sqrt{\frac{0.73*0.27}{n}}

0.04\sqrt{n} = 1.96\sqrt{0.73*0.27}

\sqrt{n} = \frac{1.96\sqrt{0.73*0.27}}{0.04}

(\sqrt{n})^2 = (\frac{1.96\sqrt{0.73*0.27}}{0.04})^2

n = 473.24

Rounding up:

A sample size of 474 is required.

3 0
3 years ago
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