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Fittoniya [83]
3 years ago
9

THIS IS EASY, BUT I NEED WORK SHOWN, PLEASE HELP!

Mathematics
2 answers:
torisob [31]3 years ago
8 0

Answer:

c

Step-by-step explanation:

Vlada [557]3 years ago
5 0
Here's how you can simplify the equation:

First off we need to simplify √12x^8, and write it as (√3x^2)(√4x^6),

We could then find the answer:

\frac{ \sqrt{ {12x}^{8} } }{ \sqrt{ {3x}^{2} } }  \\  = \frac{ \sqrt{ {3x}^{2} } \times  \sqrt{{4x}^{6} }  }{ \sqrt{ {3x}^{2} } } \\  =  \sqrt{ {4x}^{6} }   \\  =  {2x}^{3}
Thus the answer is 2x^3.

I notice that one of your answers (C,D) are repeated,perhaps you typed something wrong? The answer is either C or D in that case,do tell me if you cannot find 2x^3 at all tho.

Hope it helps!
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alina1380 [7]
C is your answer. 5x + 2 = 17

First let’s get them all in terms of x:
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On any given day, the probability that a large local river is polluted by carbon tetrachloride is 0.12. Each day, a test is cond
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Answer:

a) 0.2416

b) 0.4172

c) 0.0253

Step-by-step explanation:

Since the result of the test should be independent of the time , then the that the test number of times that test proves correct is independent of the days the river is correct .

denoting event a A=the test proves correct and B=the river is polluted

a) the test indicates pollution when

- the river is polluted and the test is correct

- the river is not polluted and the test fails

then

P(test indicates pollution)= P(A)*P(B)+ (1-P(A))*(1-P(B)) = 0.12*0.84+0.88*0.16 = 0.2416

b) according to Bayes

P(A∩B)= P(A/B)*P(B) → P(A/B)=P(A∩B)/P(B)

then

P(pollution exists/test indicates pollution)=P(A∩B)/P(B) = 0.84*0.12 / 0.2416 = 0.4172

c) since

P(test indicates no pollution)= P(A)*(1-P(B))+ (1-P(A))*P(B) = 0.84*0.88+  0.16*0.12 = 0.7584

the rate of false positives is

P(river is polluted/test indicates no pollution) = 0.12*0.16 / 0.7584 = 0.0253

4 0
3 years ago
What is the value of A?
Artemon [7]

Answer:

101

Step-by-step explanation:

The theorem to use this is the intercepted arc theorem, which tells us that if we take 2 points on the circumference of a circle and create an angle in the opposite side of the circumference, that angle is HALF that of the ARC intercepted.

If we look at 100 degree angle, we see the ARC intercepted is 99 degree and a degrees. According to theorem, we can say:

99 + a = 2(100)

99 + a = 200

a = 200 - 99

a = 101

6 0
3 years ago
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