Which of the following equations have exactly one solution? Choose all answers that apply: Choose all answers that apply: (Choice A) A 19x+18=-19x+1819x+18=−19x+1819, x, plus, 18, equals, minus, 19, x, plus, 18 (Choice B) B 19x-18=-19x+1819x−18=−19x+1819, x, minus, 18, equals, minus, 19, x, plus, 18 (Choice C) C -19x-18=-19x+18−19x−18=−19x+18minus , 19, x, minus, 18, equals, minus, 19, x, plus, 18 (Choice D) D -19x+18=-19x+18−19x+18=−19x+18

u what ?

step-by-step explanation:

answer: i literally just answered this question but they want me to do it again

step-by-step explanation:

acd, jgvjgbgbgvhgbhjjn

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.