Answer:
1: equivalent
2: equivalent
3: not equivalent
Step-by-step explanation:
for 1 & 2, you just switch the terms, but for 3, the 6z is not negative in the first expression, but it is in the second.
Answer:

Step-by-step explanation:
Common denominator: 18
-14/18 + 11/18
= -3/18
Reduce:
-1/6
The answer is -3x^2+10xy+8y^2
Rational numbers: B C D G
Irrational numbers: A E F
Irrational numbers are numbers that cannot be written as fractions, rational numbers are all other numbers