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3 years ago

PLS HELP FAST!

Mathematics

1 answer:

Semmy [17]3 years ago

8 0

Answer

64=4x+7 AND 64=4(7+x)

Step-by-step explanation:

4(x)=57 ->57+7=64 and where x=9 -> 7+9=16 ->16*4=64

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1. Identify the correct values of a , b and c using the following quadratic equation -5x² + 52x - 52 *

jasenka [17]

Answer:

1 a=-5 b=52 c=-52

it is the required answer

3 0

4 years ago

Suppose that Y1, Y2,..., Yn denote a random sample of size n from a Poisson distribution with mean λ. Consider λˆ 1 = (Y1 + Y2)/

Burka [1]

Answer:

The answer is " $\bold{\frac{2}{n}}$ ".

Step-by-step explanation:

considering $Y_1, Y_2,........, Y_n$ signify a random Poisson distribution of the sample size of n which means is λ.

$E(Y_i)= \lambda \ \ \ \ \ and \ \ \ \ \ Var(Y_i)= \lambda$

Let assume that,

$\hat \lambda_i = \frac{Y_1+Y_2}{2}$

multiply the above value by Var on both sides:

$Var (\hat \lambda_1 )= Var(\frac{Y_1+Y_2}{2} )$

$=\frac{1}{4}(Var (Y_1)+Var (Y_2))\\\\=\frac{1}{4}(\lambda+\lambda)\\\\=\frac{1}{4}( 2\lambda)\\\\=\frac{\lambda}{2}\\$

now consider $\hat \lambda_2$ = $\bar Y$

$Var (\hat \lambda_2 )= Var(\bar Y )$

$=Var \{ \frac{\sum Y_i}{n}\}$

$=\frac{1}{n^2}\{\sum_{i}^{}Var(Y_i)\}\\\\=\frac{1}{n^2}\{ n \lambda \}\\\\=\frac{\lambda }{n}\\$

For calculating the efficiency divides the $\hat \lambda_1 \ \ \ and \ \ \ \hat \lambda_2$ value:

Formula:

$\bold{Efficiency = \frac{Var(\lambda_2)}{Var(\lambda_1)}}$

$=\frac{\frac{\lambda}{n}}{\frac{\lambda}{2}}\\\\= \frac{\lambda}{n} \times \frac {2} {\lambda}\\\\ \boxed{= \frac{2}{n}}$

8 0

3 years ago

Write an equivalent expression. 7.) 27x- 5y + 5x

abruzzese [7]

Answer:

32x - 5y

Step-by-step explanation:

27x - 5y + 5x = 32x - 5y

5 0

3 years ago

What is the equation of the line that is parallel to the line y - 1 = 4(x + 3) and passes through the point (4, 32)?

Monica [59]

Answer:

y = 4x + 16

Step-by-step explanation:

y - 1 = 4(x + 3)

Has a slope of 4

y = 4x + c

32 = 4(4) + c

32 - 16 = c

c = 16

y = 4x + 16

7 0

3 years ago

Read 2 more answers

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Dennis_Churaev [7]

Answer:

6.96cm^2

Step-by-step explanation:

Area of triangle:

Base*height/2

5.8*2.4/2

Area = 6.96cm^2

5 0

3 years ago

Read 2 more answers