Use each unit rate to me find the total 1) amanda buys 5 hats at $9.79 each. how much does she spend? 2) mckayla works for 5 hours at $10.25 per hour. how much does she earn? 3) tom writes a 7 page essay with 225 words per page. how many words are in the essay? last one4) chase owns 32 chickens and each one produces 2 eggs per day. how many eggs can he collect each 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