Resuelve las siguientes los siguientes ejercicios a)(+3)+(+21) + (-15) =
b)(-5) + (+7)+(- 12) =
c)(+14) + (-9) + (-7)=
d)+13-5 + 4 -11 -6 -11 - 4 + 45
=
e)+9-5 + 11 - 12 + 14 =​

por favor

answer: 0.1,0.85

step-by-step explanation:

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6