Help ASAP Select all expressions that are perfect squares.

Group of answer choices

2x^2+20x+100

9x^2+24x+16

(7−3x)^2

(5x+4)(5x−4)

(1−2x)(−2x+1)

4^2+6+9/4

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