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Elanso [62]
2 years ago
12

Solve the system by any method. (3x – 4y = -5 (5x + 8y = -1

Mathematics
2 answers:
Pachacha [2.7K]2 years ago
5 0
The answer is (-1,1/2)
Taya2010 [7]2 years ago
4 0

Answer:

( x , y ) = ( -1,1/2)

Step-by-step explanation:

Solve the equation for X

\left \{ {{x=-5/3+4/3y} \atop {5x+8y=-1}} \right.

Substitute the given value of x into the equation 5x + 8y = -1

5(-5/3+4/3y)+8y=-1

Solve the equation for Y

y=-1/2

Substitute the given value of y into the equation x = -5 / 3 + 4 / 3y

x=-5/3+4/3×1/2

Solve the equation for X

x=-1

The system solution is the computer pair

(x,y)=(-1,1/2)

Check if the ordered pair given to the solution of the system of equations

\left \{ {{3*(-1)-4*1/2=-5} \atop {5*(-1)+8*1/2=-1}} \right.

Simplify the equations

\left \{ {{-5=-5} \atop {-1=-1}} \right.

The ordered pair is the solution of the system of equations, since both equations are true

(x,y)=(-1,1/2)

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The probability distribution function for the discrete random variable where x is equal to the number of red lights drivers typi
Ivahew [28]

Using probability concepts, it is found that:

a) The missing value is 0.04.

b) The mean is of 0.37.

The distribution is given by:

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P(X = 2) = 0.05

P(X = 3) = x

Item a:

The sum of <u>all the probabilities has to be 1</u>, that is:

\sum_{i = 0}^{3} P(X = i) = 1

Thus:

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The missing value is 0.04.

Item b:

The mean is given by the <u>sum of each outcome multiplied by it's probability</u>, thus:

E(X) = 0(0.76) + 1(0.15) + 2(0.05) + 3(0.04) = 0.37

The mean is of 0.37.

A similar problem is given at brainly.com/question/20709747

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Step-by-step explanation:


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Use a calculator to find the standard deviation of this data set:
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Answer:

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Read 2 more answers
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