Help pleasee There is a screenshot attached!

40/33

Step-by-step explanation:

x=1.21 (21 repeating)

100x=121.21 (21 repeating)

100x-x=121.21-1.21

100x-1x=(121+0.21)-(1+0.21)

99x=120+0

99x/99=120/99

x=40/33

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

c-   36

taxicab circle radius 9 has 4(9) = 36 points