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12345 [234]
2 years ago
5

Examine the system of linear equations. –3x y = 2 2x 4y = –20 Which number could be multiplied by the first equation to eliminat

e the y when the equations are added together? -4 4 2 10.
Mathematics
2 answers:
Oksanka [162]2 years ago
8 0

Answer:

The answer is A Or 4

Step-by-step explanation:

EDGE 2022

satela [25.4K]2 years ago
3 0

Answer:

A - -4

Step-by-step

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Franchise Business Review stated over 50% of all food franchises earn a profit of less than $50,000 a year. In a sample of 130 c
nydimaria [60]

Answer:

We need a sample size of 564.

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 zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

\pi = \frac{81}{130} = 0.6231

The margin of error is:

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

95% confidence level

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

Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.

We need a sample size of n

n is found when M = 0.04

So

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

0.04 = 1.96\sqrt{\frac{0.6231*0.3769}{n}}

0.04\sqrt{n} = 1.96\sqrt{0.6231*0.3769}

\sqrt{n} = \frac{1.96\sqrt{0.6231*0.3769}}{0.04}

(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.6231*0.3769}}{0.04})^{2}

n = 563.8

Rounding up

We need a sample size of 564.

4 0
3 years ago
6n-3>-18 please show work
maxonik [38]
First off, add 3 to both sides of the equation.
6n - 3 + 3 > -18 + 3
Then, your equation should look like this: 6n > -15
Next, divide both sides by 6.
6n/6 > -15/6
Your answer is n > -5/2
6 0
3 years ago
Read 2 more answers
The ratio of 5 to 15
steposvetlana [31]

Answer:

the ratio of 5 to 15 is

1/3  hope i helped please check out my latest question i need help with homework

Step-by-step explanation:

its simplified

5 0
2 years ago
Read 2 more answers
Questions 1-3 40 points
meriva

Answer:

  16%

Step-by-step explanation:

The additional wage amount is $80.

The original wage amount is $500.

The ratio of the two is ...

  $80/$500 = 0.16 = 16/100

To express that ratio as a percentage, multiply it by 100%.

  0.16 × 100% = 16%

_____

It might help you to think of the percent sign (%) as a fancy way to write "per hundred" (/100). Of course, using your knowledge of place value, you know that 0.16 = sixteen hundredths = 16/100.

Realizing the meaning of the % sign, you can immediately write this as 16%.

4 0
3 years ago
9234 divided by 52 but what is the remainder
HACTEHA [7]

Answer:

In a decimal it would be 177.577

In a fraction it would be 177  577/1000

5 0
3 years ago
Read 2 more answers
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