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Ann [662]
3 years ago
8

Tentukan himpunan x-y=2 x+y=1

Mathematics
1 answer:
ivanzaharov [21]3 years ago
5 0
X-y=2  ................1
x+y=1    .........2

now by adding 1 and 2 we get,
x-y+x+y=2+1
=> 2x=3
=>x=3/2=1.5
now y=1-x=1-1.5=-0.5
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Blizzard [7]

Answer:

ight bet so if 2 and 2 is 4

4 0
3 years ago
A screening test for a certain disease is used in a large population of people of whom 1 in 1000 actually have the disease. Supp
sertanlavr [38]

Answer:

P(D/T)=5.05*10^{-6}

Step-by-step explanation:

Let's call D the event that a person has the disease, D' the event that a person doesn't have the disease and T the event that the person tests negative for the disease.

So, the probability P(D/T) that a randomly chosen person who tests negative for the disease actually has the disease is calculated as:

P(D/T) = P(D∩T)/P(T)

Where P(T) = P(D∩T) + P(D'∩T)

So, the probability P(D∩T) that a person has the disease and the person tests negative for the disease is equal to:

P(D∩T) = (1/1000)*(0.005) = 0.000005

Because 1/1000 is the probability that the person has the disease and 0.005 is the probability that the person tests negative given that the person has the disease.

At the same way, the probability P(D'∩T) that a person doesn't have the disease and the person tests negative for the disease is equal to:

P(D'∩T) = (999/1000)*(0.99) = 0.98901

Finally, P(T) and P(D/T) are equal to:

P(T) = 0.000005 + 0.98901 = 0.989015

P(D/T) = 0.000005/0.989015 = 5.05*10^{-6}

8 0
3 years ago
What is the equation of a line that passes through (-1, 2) and (5, 2)?
Oliga [24]

The equation should be y=2

7 0
3 years ago
Solve for x.<br><br> −4(x−7)=36<br><br> Enter your answer in the box.
alex41 [277]

Answer:

The answer is x= -16!

Step-by-step explanation:

-4(x-7)=36

-4x- 28= 36

     +28    +28

-4x= 64

/-4     /-4

x= -16

I hope this helps!

p.s. have any more questions? Post the question and comment the link below!

Ciao!

♥, Sadie  

5 0
3 years ago
Read 2 more answers
100 Points<br><br> Solve for X
bixtya [17]
A) By the rules of secants,
  5(x +5) = 6(6 +4)
  x + 5 = 12
  x = 7


b) 3(3 +5) = 4(x +4)
  6 = x +4
  2 = x
5 0
3 years ago
Read 2 more answers
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