Answer:
-19n^4 - 8m^2 - 12m^4n
Step-by-step explanation:
8m^2 + 12m^4n + 9mn
-
19n^4 9mn
------------------------------------------------------------------------
-19n^4 - 8m^2 - 12m^4n
B. Upside Down V- Shaped
When you draw it out, it looks like a upside down V.
X=15
Y= -7
Remember to form simultaneous equations with the information given
3x+50=6x-10
subtract 3x
50=3x-10
add 10
60=3x
divide by 3
20=x