Answer:
x = -2
Step-by-step explanation:
Answer:
XZ
Step-by-step explanation:
The intersection of the 2 planes is along the line XZ
Answer:
is sometimes positive and sometimes negative.
Step-by-step explanation:

Take 

Take 

Hence
for
and
for 
So
is sometimes positive and sometimes negative in the interval.
You have to convert the percent into a decimal before you convert it into a fraction then you simplify the fraction.
Hope this helps! :)