What is the value of the expression:
1/2 - (-1/3 + 2/5)?

13/3 0r 0.43·

Step-by-step explanation:

0.5-(-1/3+2/5)=13/30

=0.43·

-13/30

Step-by-step explanation:

-1/3 + 2/5 = -5/15 + 6/15 = 1/15

1/2 - 1/15 = 15/30 - 2/30 = -13/30

I'm not completely sure but I'm pretty sure. Hope this helps!

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