Marcus bought a vase with an original price of $220. If he had to pay a sales tax of 7%, How much sales tax would
Marcus have to pay?
I

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

the answer is  

d.

21

i did this one. so you should get it right.

answer: given the scale 3,5 mm to 1 foot: so you know this and you need convert this 150mm to get the right answer.