These are the fees for sending a package by media mail: $2.41 for the first pound $0.41 per additional pound for the next six pounds $0.39 per additional pound after that for example, a two-pound package costs $2.82 to send by media mail. if a package full of books costs $7.99 to send by media mail, how many pounds does the package weigh? explain your work in complete sentences. plz

oof

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