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3 years ago

Gabriel wants to send a parcel to Italy.

Mathematics

2 answers:

svp [43]3 years ago

6 0

£56

The answer is 56

Cerrena [4.2K]3 years ago

5 0

Answer: Both £56

Step-by-step explanation:

We deliver: 10 x 20 x 40 = 8000

8000 x 0.80/cm = £56

£56

Go Parcels: 2(10 x 20) + 2(10 x 40) + 2(20 x 40) = 2800

2800 x 0.02/cm = £56

£56

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3 years ago

Solve this system of equations algebraically: y – 10 = 11x + x2 y – 12x = 30

boyakko [2]

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3 years ago

16+28÷2-6 over 10-4x2

Levart [38]

Answer:

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8 0

3 years ago

Use the angle measures and side lengths to classify the triangle. A) right scalene B) acute scalene C) right isosceles D) obtuse

timurjin [86]

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5 0

3 years ago

An insurance company sells automobile liability and collision insurance. Let X denote the percentage of liability policies that

qaws [65]

Answer:

-764.28

Step-by-step explanation:

Given the joint cumulative distribution of X and Y as

$F(x,y) = \frac{xy(x+y)}{2000000}\ \ \ \, \ 0\leq x100, 0\leq y\leq 100$

#First find $F_x$ and probability distribution function , $f_x(x)$ :

$F_x(x)=F(x,100)\\\\\\=\frac{100x(x+100)}{2000000}\\\\\\\\=\frac{100x^2+10000x}{2000000}\\\\\\=>f_x(x)=\frac{x}{10000}+\frac{1}{200}$

#Have determined the probability distribution unction , $f_x(x)$ , we calculate the Expectation of the random variable X:

$E(X)=\int\limits^{100}_0 \frac{x^2}{10000}+\frac{x}{200} dx \\\\\\\\=|\frac{x^3}{30000}+\frac{x^2}{400}|\limits^{100}_0\\\\=58.33\\\\$

#We then calculate $E(X^2)$ :

$E(X^2)=\int\limits^{100}_0 \frac{x^3}{10000}+\frac{x^2}{200}\ dx\\\\=\frac{x^4}{40000}+\frac{x^3}{600}|\limits^{100}_0=4166.67\\\\Var(X)=E(X^2)-(E(X))^2=4166.67-58.33^2\\\\Var(X)=764.28$

Hence, the Var(X) is 764.28

4 0

3 years ago