Question

Can someone help me at this

Answer 1

correct answer right here

Answer 2

a - 2

Explanation:

Perimeter = side 1 + side 2 + side 3

So

6a + 3 = 2(a + 3) + (3a - 1) + side 3

side 3 = (6a + 3) - (2a + 6) - (3a - 1)

side 3 = 6a - 2a - 3a + 3 - 6 + 1 = a - 2