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2 years ago

4. y = -(x+2)2 - 7how do you write the equation in standard Form

Mathematics

1 answer:

borishaifa [10]2 years ago

3 0

Answer:

2x+4y=-11

Step-by-step explanation:

4. y = -(x+2)2 - 7

4y=-2x-4-7

4y=-2x-11

2x+4y=-11

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Two months ago, Marty’s dog weighed 3712 pounds. The dog was put on a diet and exercise plan and now weighs 2914 pounds. How muc

deff fn [24]

Answer:

Step-by-step explanation:

3712-2914= 798 pounds

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2 years ago

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It takes 113 pounds of seed to completely plant a 12 -acre field. how many acres can be planted per pound of seed?

svp [43]

The answer is <span>0.10619469026.

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2 years ago

A normally distributed random variable with mean 4.5 and standard deviation 7.6 is sampled to get two independent values, X1 and

mr Goodwill [35]

Answer:

Bias for the estimator = -0.56

Mean Square Error for the estimator = 6.6311

Step-by-step explanation:

Given - A normally distributed random variable with mean 4.5 and standard deviation 7.6 is sampled to get two independent values, X1 and X2. The mean is estimated using the formula (3X1 + 4X2)/8.

To find - Determine the bias and the mean squared error for this estimator of the mean.

Proof -

Let us denote

X be a random variable such that X ~ N(mean = 4.5, SD = 7.6)

Now,

An estimate of mean, μ is suggested as

$\mu = \frac{3X_{1} + 4X_{2} }{8}$

Now

Bias for the estimator = E(μ bar) - μ

= $E( \frac{3X_{1} + 4X_{2} }{8}) - 4.5$

= $\frac{3E(X_{1}) + 4E(X_{2})}{8} - 4.5$

= $\frac{3(4.5) + 4(4.5)}{8} - 4.5$

= $\frac{13.5 + 18}{8} - 4.5$

= $\frac{31.5}{8} - 4.5$

= 3.9375 - 4.5

= - 0.5625 ≈ -0.56

∴ we get

Bias for the estimator = -0.56

Now,

Mean Square Error for the estimator = E[(μ bar - μ)²]

= Var(μ bar) + [Bias(μ bar, μ)]²

= $Var( \frac{3X_{1} + 4X_{2} }{8}) + 0.3136$

= $\frac{1}{64} Var( {3X_{1} + 4X_{2} }) + 0.3136$

= $\frac{1}{64} ( [{3Var(X_{1}) + 4Var(X_{2})] }) + 0.3136$

= $\frac{1}{64} [{3(57.76) + 4(57.76)}] } + 0.3136$

= $\frac{1}{64} [7(57.76)}] } + 0.3136$

= $\frac{1}{64} [404.32] } + 0.3136$

= $6.3175 + 0.3136$

= 6.6311

∴ we get

Mean Square Error for the estimator = 6.6311

6 0

3 years ago

Juan was presented with the following problem on a math test: "Divide 3/4 by 5/7 Show your work" His work is shown below. What w

nignag [31]

Answer:

0.952381

Step-by-step explanation:

Juan forgot to simplify 20/21 when he got his answer and was supposed to round to the nearest 6 decimals places and when he simplify it, it was supposed to be written in decimal form

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2 years ago

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Find the value when x = 2 and y =3. (2x + 5y)^0 0 1 19

Alexxx [7]

I don’t get what ^0 0 1 19 means but it’s
2(2) + 5(3)

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2 years ago

4. y = -(x+2)2 - 7how do you write the equation in standard Form​

4. y = -(x+2)2 - 7how do you write the equation in standard Form