Answer:
triangle
Step-by-step explanation:
The cross section is a triangle.
Answer:


Step-by-step explanation:
Given


Required
Solve by elimination
To do this, we subtract both equations (to eliminate x)

- 
--------------------


Substitute
in 

Solve for 3x

Solve for x


Y=mx+b...............................................................................................
Answer:
A
Step-by-step explanation:
Sorry if it is wrong
Answer:
an=33n-13
Step-by-step explanation:
86-53=33
53-20=33
That's where 33n comes from
-13 comes from
20-33=-13
Hope this helps! :)