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Law Incorporation [45]
3 years ago
11

Pls answer 5x-7y=58 y=-x+2

Mathematics
2 answers:
Zinaida [17]3 years ago
8 0

Answer:

x = 6

y = -4

Step-by-step explanation:

Plug y into the first equation.

5x - 7(-x+2) = 58

Then, solve for x.

Plug in x back to any one of the equations to find y.

swat323 years ago
6 0

Answer:  ( 6, -4)

Step-by-step explanation:

Substitute the value of y in the second equation  into the first equation and solve for x.

5x - 7(-x + 2) = 58       Distribute

5x + 7x - 14 =58      Combine like terms

12x - 14 = 58

      +14    +14

12x =    72

x  = 6  

Input  the value for x intro one of the equations to solve for y .

5(6) - 7y = 58

30 -7y = 58

-30          -30

    -7y = 28

   y = -4

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A coin is tossed 4 times. Let E1 be the event "the first toss shows heads" and E2 the event "the second toss shows heads" and so
Elden [556K]

Answer:

The events are independent.

The probability of showing heads on both toss is equal to 1/2

Step-by-step explanation:

The sample space for this experiment consists of 2⁴= 16 sample points, as each toss can result in two outcomes we assume that the events are equally likely.

Two events are independent in the sample space if the probability of one event occurs, is not affected by whether the other event has or has not occurred.

In general the k events are defined to be mutually independent if and only if the probability of the intersection of  any 2,3,--------, k  equals the product of their respective probabilities.

P (A∩B) = P(A). P(B)

P (A∩B)   = 1/2. 1/2= 1/4

                                                                  Head          Tail

 P(E1)= 1/2  ----------          Coin 1               H,H              T,H

                                                                1/4                  1/4

  P(E2)= 1/2  ---------------  Coin 2             H, H               H,T

                                                                      1/4           1/4

So the events are independent.

The probability of showing heads on both toss is equal to 1/2

The sample space for this experiment consists of 2⁴= 16 sample points, out of which eight will have heads on both toss.

Or in other words ( 1/4* 1/4) = 2/4 = 1/2

4 0
3 years ago
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tekilochka [14]

Answer:

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and

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Let's expand:

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3 0
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3 0
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