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MissTica
3 years ago
13

y=-2x - 2 y = 2x – 6 Click on the correct answer. no solution solutions all numbers on the line one solution: {0.-6) one solutio

n: {1.-4}​
Mathematics
1 answer:
Artyom0805 [142]3 years ago
8 0

Answer:

{1,-4}

Step-by-step explanation:

The two equations have different slopes, so the system is possible

y = -2x - 2

y = 2x - 6

2x - 6 = -2x - 2

4x = 4

x = 1

y = 2 - 6

y = -4

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A sample of 5 buttons is randomly selected and the following diameters are measured in inches. Give a point estimate for the pop
Helen [10]

Answer:

s^2 = \frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}

But we need to calculate the mean with the following formula:

\bar X = \frac{\sum_{i=1}^n X_I}{n}

And replacing we got:

\bar X = \frac{ 1.04+1.00+1.13+1.08+1.11}{5}= 1.072

And for the sample variance we have:

s^2 = \frac{(1.04-1.072)^2 +(1.00-1.072)^2 +(1.13-1.072)^2 +(1.08-1.072)^2 +(1.11-1.072)^2}{5-1}= 0.00277\ approx 0.003

And thi is the best estimator for the population variance since is an unbiased estimator od the population variance \sigma^2

E(s^2) = \sigma^2

Step-by-step explanation:

For this case we have the following data:

1.04,1.00,1.13,1.08,1.11

And in order to estimate the population variance we can use the sample variance formula:

s^2 = \frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}

But we need to calculate the mean with the following formula:

\bar X = \frac{\sum_{i=1}^n X_I}{n}

And replacing we got:

\bar X = \frac{ 1.04+1.00+1.13+1.08+1.11}{5}= 1.072

And for the sample variance we have:

s^2 = \frac{(1.04-1.072)^2 +(1.00-1.072)^2 +(1.13-1.072)^2 +(1.08-1.072)^2 +(1.11-1.072)^2}{5-1}= 0.00277\ approx 0.003

And thi is the best estimator for the population variance since is an unbiased estimator od the population variance \sigma^2

E(s^2) = \sigma^2

3 0
3 years ago
Y + 1 = -2x-3 in standard form *
notka56 [123]

Answer:

<em>y = -2x - 4</em>

Step-by-step explanation:

<em>y + 1 = -2x - 3</em>

<em>Subtract 1 from both sides to get the y by itself</em>

<em>y = -2x - 3 - 1</em>

<em>Simplify (Combine Like terms)</em>

<em>y = -2x - 4</em>

8 0
3 years ago
NO SILLY ANSWERS PLEASE <br> Can someone help me with this?
marusya05 [52]
Keep in mind that, when the logarithm base is not explicitly written, base 10 is assumed, therefore,

\bf \textit{Logarithm Cancellation Rules}\\\\&#10;log_a a^x\implies x\qquad \qquad a^{log_ax}=x\\\\&#10;-------------------------------\\\\&#10;10^{log(3)}+log(100)\implies 10^{log_{10}(3)}+log_{10}(100)\implies 3+log_{10}(10^2)&#10;\\\\\\&#10;3+2\implies 5
7 0
3 years ago
Eric has 4 pieces of clay he cut out each piece of clay into thirds how many 1/3 size pieces of clay does Eric have
Ivahew [28]

Answer:

ERIC HAD 12 PIECES OF CLAY LEFT

Step-by-step explanation:

1/3 + 4 = 12

4 0
3 years ago
Help me plzzzzzzzzzz
ratelena [41]

Answer:

C

Step-by-step explanation:

im not 100% sure but i beleive its C

4 0
3 years ago
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