How many solutions does the system have? \begin{cases} 5x-y=2 5x-y=-2 \end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ ​ 5x−y=2 5x−y=−2 ​ Choose 1 Choose 1 (Choice A) A Exactly one solution (Choice B) B No solutions (Choice C) C Infinitely many solutions

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

State one method by which you can recognize a perfect square trinomial.