If the probability of an event is 2/7, what must be the probability of its complement?

The answer is

Step-by-step explanation:

In order to determine the probability, we have to know about complement.

The probability of the complement of any event is the difference between one and the probability of the event.

Pe=probability of the event

Pc=probability of the complement of the event

We know the probability of the event, so we replace that value in the expression:

Then:

Finally, the probability of its complement is

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

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