Ellahcampanaviz Ellahcampanaviz Math Answered A.-3+9B, 7-9c.o15. The longest side of a triangle is 3x+10 meters and the other two sides are2x+5 and 3x+5 meters. What is the perimeter of a triangle?A. 10-20D. 77+20C, 8x-20B. 8x+20