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san4es73 [151]
3 years ago
9

Can someone help with that?if x+y=2, calculate: P=4x (x-3)+4y(y-3)+8xy​

Mathematics
1 answer:
olganol [36]3 years ago
6 0

Answer:

Step-by-step explanation:

P = 4x(x - 3) + 4y(y - 3) + 8xy

  = 4x² - 12x + 4y² - 12y + 8xy

  = (4x² + 8xy + 4y²) - (12x + 12y)

 = 4(x² + 2xy + y²) - 12(x + y)

 = 4(x + y)² - 12(x + y)

x+y =2 ⇒ P = 4.2² - 12.2 = 16 - 24 = -8

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3 years ago
Use the sample information 11formula13.mml = 37, σ = 5, n = 15 to calculate the following confidence intervals for μ assuming th
bija089 [108]

Answer & Step-by-step explanation:

The confidence interval formula is:

I (1-alpha) (μ)= mean+- [(Z(alpha/2))* σ/sqrt(n)]

alpha= is the proposition of the distribution tails that are outside the confidence interval. In this case, 10% because 100-90%

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mean= 37

n= number of observations. In this case, 15

(a)

Z(alpha/2)= is the critical value of the standardized normal distribution. The critical valu for z(5%) is 1.645

Then, the confidence interval (90%):

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(b)

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Then, the confidence interval (90%):

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C. The interval gets wider as the confidence level increases.

8 0
3 years ago
The Knicks and Nets have a total 30 players.
Blababa [14]

Answer:

Step-by-step explanation:

From the problem statement, we can set up the following two equations:

K + N = 30

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where K is the number of Knicks players, and N is the number of Nets players.

We can substitute the first equation into the second and solve for K

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10K + 300 = 500

10K = 200

K = 20

5 0
3 years ago
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