Answer:
398.411
Step-by-step explanation:
Explanation has been given in the following attachments.
Answer:
vertical
Step-by-step explanation:
All parallelograms are quadrilateral
Answer:
Step-by-step explanation:
Answer:
230 were sold at the door
170 were sold in advance
Step-by-step explanation:
x=at door y=in advance
x+y=400
3x+2y=1030
y=-x+400
2y=-3x+1030
y=-3/2x+515
-x+400=-3/2x+515
x=230 y=170