Question

Verify that (x+y) +z = x + ( y + z) , if x = ⅘, y = -3/6 , z = -2 /15

Answer 1

Answer: it's true

Step-by-step explanation:

(x+y)+z=x+(y+z)

(x+y)+z=(4/5+-3/6)+(-2/15)

=(4/5-3/6)-2/15

=(24-15)/30 -2/15

= 9/30-2/15

=9/30-4/30

=5/30

=1/6--(1)

x+(y+z)=4/5+(-3/6-2/15)

=4/5+(-15/30-4/30)

=4/5+(-19/30)

=24/30-19/30

=5/30

=1/6--(2)

(1)=(2)

therefore (x+y)+z=x+(y+z)