The equation used would be:
4m + 2 = 30
where the answer would be 7.
Hey
périmètre = 2 ( x + 2 x - 5) = 2 x + 4 x - 10 = 6 x - 10
B how many ways can they register for the same section
This is completing the square:
(x^2+12x+36)+42-36
Answer: (x+6)^2 +6
