Please answer as a fraction

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Analysis: blue 3                 3+2+4 = 9 total marbles

              red 2

              green 4

Probability of two blue = 3/9 x 2/8 = 1/12 = 3/36

Probability of two red = 2/9 x 1/8 = 1/36

Probability of two green = 4/9 x 3/8 = 1/6 = 6/36

Probability pf two the same = 3/36 + 1/36 + 6/36 = 5/18

The probability of getting two of the same colour is 5/18. In order to determine the percentage you must divide 5 by 18 and mulitply x 100 and round it. (5/18 = 0.2777777777777778 x 100 = 27.77777777777778 about 27%)

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

they would have to work 32 hours.