Ira wants to determine the fast food restaurant preferred by the majority of twelve year olds in his town. which sample population should he survey to get a random sample? a.) every third child that enters junior high school on a particular day. b.) every twelve year old that enters a particular hamburger restaurant in town. c.) every twelve year old that leaves a particular pizza restaurant in town. d.) every third twelve year old that leaves school on a particular day.

b). 4320 have a nice day

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