The table shows the cost of books at our school library book sale. Do the data in the table show a constant of proportionality. If so, what is the constant of proportionality, k= y/x? A: 2
B: 2.5
C: 2/5
D: there is no constant of proportionality.

283 square feet

step-by-step explanation:

good luck

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

if you would like with a question it is easy to get an answer by including some or multi choice options

step-by-step explanation: