Use distributive property:

Answer: -1/5
Step-by-step explanation:
14/20 - 81/90=
7/10-9/10= ==> 10 is the GCF of 20 and 90
(7-9)/10=
-2/10=-1/5
Answer:
Ok so it would be square root 1
Step-by-step explanation:
I believe it is false because it only passes through the y-axis not the x-axis.