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wel
1 year ago
12

If the probability of events is 2/7 what must be the complement ?

Mathematics
1 answer:
Ad libitum [116K]1 year ago
8 0

If the probabilty of Event E is p, then,

the probability of Complement of Event E would be "1 - p".

So, to get the complement's probability, we subtract the normal probability from "1".

Hence, the probabilty of the complement would be:

\begin{gathered} 1-\frac{2}{7} \\ =\frac{7}{7}-\frac{2}{7} \\ =\frac{5}{7} \end{gathered}

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Plot the point (3, 2pi/3)​, given in polar​ coordinates, and find other polar coordinates (r, θ )of the point for which the foll
exis [7]

Answer:

(a) (3, -\frac{4\pi}{3})

(b) (-3, \frac{5\pi}{3})

(c)(3, \frac{8\pi}{3})

Step-by-step explanation:

All polar coordinates of point (r, θ ) are

(r,\theta+2n\pi) and (-r,\theta+(2n+1)\pi)

where, θ is in radian and n is an integer.

The given point is (3, \frac{2\pi}{3}). So, all polar coordinates of point are

(3, \frac{2\pi}{3}+2n\pi) and (-3, \frac{2\pi}{3}+(2n+1)\pi)

(a) r>0,-2\pi\leq \theta

Substitute n=-1 in (3, \frac{2\pi}{3}+2n\pi), to find the point for which r>0,-2\pi\leq \theta.

(3, \frac{2\pi}{3}+2(-1)\pi)

(3, -\frac{4\pi}{3})

Therefore, the required point is (3, -\frac{4\pi}{3}).

(b) r

Substitute n=0 in (-3, \frac{2\pi}{3}+(2n+1)\pi), to find the point for which r>0,-2\pi\leq \theta.

(-3, \frac{2\pi}{3}+(2(0)+1)\pi)

(-3, \frac{2\pi}{3}+\pi)

(-3, \frac{5\pi}{3})

Therefore, the required point is (-3, \frac{5\pi}{3}).

(c) r>0,2\pi \leq \theta

Substitute n=1 in (3, \frac{2\pi}{3}+2n\pi), to find the point for which r>0,2\pi \leq \theta.

(3, \frac{2\pi}{3}+2(1)\pi)

(3, \frac{2\pi}{3}+2\pi)

(3, \frac{8\pi}{3})

Therefore, the required point is (3, \frac{8\pi}{3}).

4 0
3 years ago
If 3^2x+1 = 3^x+5, what is the value of x?
shtirl [24]

Answer:

4

Step-by-step explanation:

Since the bases are equal the powers also are equal

so

2x + 1 = x + 5

2x - x = 5 - 1

x = 4

6 0
3 years ago
When the distributed property is used to solve 3(x+5)=5x-7, what could the next step be?
Burka [1]

Answer:

after distributive property, it would be 3x+15=5x-7

the next step would be to simplify by moving the variables one side and the numbers the other, -2x= -22, then after isolate variable by dividing -2.

x= 11

7 0
3 years ago
What is 555/74?<br><br><br> Thank YOU!
Hitman42 [59]

Answer:

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Hope this helps! :)

8 0
3 years ago
Read 2 more answers
Please help me with the question below
nata0808 [166]

Answer:

4

Step-by-step explanation:

If Judge is x years old and Eden is 6 years older, then Eden is x + 6 years old.

The second part tells us that Eden will be twice as old as Judge in two years.

This means that in two years: (Eden's age) = 2 * (Judge's age).

Since we know that Eden's age can be represented as x + 6 and Judge's age can be represented as x, we can write this: x + 6 = 2 * x

Simplify the equation:

x + 6 = 2x

6 = x = Judge's age (in two years)

If Judge is 6 two years later, then he must be 4 now.

To check our work, we can just look at the problem. Judge is 4 years old and Eden is 6 years older than Judge (that means Eden is 10 right now). Two years later, Eden is 12 and Judge is 6, so Eden is twice as old as Judge. The answer is correct.

6 0
3 years ago
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