The ratio of rock music to total cds that ella owns is 25/40. paolo has 50 rock music cds. the ratio of rock music to totals cds in his collection is equivalent to the ratio of rock music to total cds in ella's collection. how many cds do they own? a) 65 b) 80 c) 120 d) 130

p = 6s

step-by-step explanation:

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