Part A:the sides of the triangle are 3x,3x, and 15 what is the perimiter of the triangle? Part B:​If the perimeter of the triangle is 90, what is the value of x?

HURRYY PLZ

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

300b(x) is graphed by the functio