Answer: 2/3
(7/9) (18/21)
(7/9) (6/7)
common factor is 3 between 18 and 21. 7 x 3 = 21 and 6 x 3 = 18
7/9 6/7 multiply 7 x 9 = 63 and 6 x 7 = 42
= 42/63
= 2/3
decimal: 0.666667
Both are functions. Try not to get tripped up on notation of functions. They are they same, just written differently.
f(x) = 3x-10 is the same as 0=3x-10
2x+7y=28 is the same as 2x+7y-28=0
Just one will give you a line and the other will give you a circle. If you are ever unsure, plug them into a graphing calculator and see what you get back.
14 should be 145 hope this helps
