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3 years ago

5x+2y = 19 1x + 4y=13

Mathematics

2 answers:

zalisa [80]3 years ago

8 0

{x,y} %}14 because u have to get the number the do _____ then ____

Mama L [17]3 years ago

7 0

Answer:

{x,y} = {25/9,23/9}

Step-by-step explanation:

// Solve equation [2] for the variable x

[2] x = -4y + 13

// Plug this in for variable x in equation [1]

[1] 5•(-4y+13) + 2y = 19

[1] - 18y = -46

// Solve equation [1] for the variable y

[1] 18y = 46

[1] y = 23/9

// By now we know this much :

x = -4y+13

y = 23/9

// Use the y value to solve for x

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Solve 2x+2>10 i need to know what this is?

mrs_skeptik [129]

Answer:

x>4

Step-by-step explanation:

$2x + 2 > 10 \\ 2x > 10 - 2 \\ 2x > 8 \\ x > 4$

Sorry if there is any mistakes

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3 years ago

write the particular equation of this transformed sine graph. assume that the horizontal shift is 1 unit to the right. (hint: tr

Goryan [66]

We are given the graph of sine function.
First, we get the amplitude
A = [6 - (-2)] / 2
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4 0

3 years ago

Read 2 more answers

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s2008m [1.1K]

Hello!

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In this scenario, after Natalia finds the distances, she must add them all up and then divide by the number of data points.

I hope this helps!

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3 years ago

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Denzel and three friends go to the movies. each person buys a movie ticket for $8, a snack for $4, and a drink for $2. which num

swat32

8(4) + 4(4) + 4(2)
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6 0

2 years ago

Of 585 samples of seafood purchased from various kinds of food stores in different regions of a country and genetically compared

Dafna1 [17]

Answer:

a) The 99% confidence interval is from 14.8% to 23.2%.

b) The confidence interval tells us that the true proportion of mislabeled is within 14.8% and 23.2%, with a 99% confidence. In other words, if we take samples of the same size, 99% of the samples will have a proportion within 0.148 and 0.232.

c) The confidence interval calculation take into account the sample size, so the width (or precision) of the interval depends on the sample size.

The only criticism that could be analyzed is to see if the sample is representative of the population.

Step-by-step explanation:

a) We have to calculate a 99% confidence interval for the proportion.

The sample proportion is p=0.19.

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.19*0.81}{585}}\\\\\\ \sigma_p=\sqrt{0.000263}=0.016$

The critical z-value for a 99% confidence interval is z=2.576.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=2.576 \cdot 0.02=0.042$

Then, the lower and upper bounds of the confidence interval are:

$LL=p-z \cdot \sigma_p = 0.19-0.042=0.148\\\\UL=p+z \cdot \sigma_p = 0.19+0.042=0.232$

The 99% confidence interval for the population proportion is (0.148, 0.232).

5 0

2 years ago