Which ordered pairs are a solution to the equation y = 2x - 3
select all that apply. (4,2)(1,-,-7)(2,1)

(1,-1), and (2,1) are the two solutions.

Step-by-step explanation:

To answer this, we can just test out each of the options.

Let's start with (4,2). Let x = 4, and put this into the equation:

We get that y = 2x4 - 3 = 5.  So since this doesn't equal 2, (4,2) is not a solution.

We can then test out the rest of the options in a similar way, and we see that:

2x(1) -3 = -1. So (1,-1) is a solution.

2x(-1) -3 = -5, so (-1, 7) is NOT a solution.

2x(2) - 3 = 1, so (2,1) is a solution.

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