Resolva as expressoes numericas: A) (45-9) : (-30+21)+(-8) B) (-6) - (-32 - 22): (19-10) C) (-67+23) : (-4)+(-13+11) D) 28: (79-93)+(-65-31):(18-42)

Aline parallel to a triangle's side splits ab into lengths of x - 5 and x + 2. the other side, ac, is split into lengths of x and x + 12. what is the length of ac? a) 12 b) 24 c) 36 d)

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Find the value of x for which line a is parallel to line b