Choose the abbreviation of the postulate or theorem that supports the conclusion that the triangles are congruent. given: ∠c, ∠f are rt. ∠'s; ∠b = ∠e; bc = ef hl ll ha la hurry and answers 30 pts

D.

Step-by-step explanation:

LA

Option D.

LA Theorem or Postulates

Explanation:

LA theorem or postulates is leg-acute states that if the leg and an acute angle of one right triangle are congruent to the corresponding leg and acute angle of another right triangle, then the triangles are congruent.

In and  

            [Given]

  [Acute angle]      [Given]

       [Given]

By LA theorems or postulates,

Therefore, LA theorems or postulates support the conclusion that the triangles are congruent.

it's d.

step-by-step explanation:

because: -1(4x + 1y) +2 (1x-3y) distribute each number into the parenthesis.

then you would get: -4x - 1y + 2x -6y combine like terms

and get: 2x -7y

hope my answer has you if not then i'm sorry.