From the given figure, we know that:

This means that the three sides of triangle MNO are congruent to three sides of triangle LMO. Therefore, the triangles are congruent by Side Side Side postulate.
Answer:
7x+21y=5439
x+y=305
Step-by-step explanation:
it's pretty self explanatory, right?
Answer:
$200,000
Step-by-step explanation:
6,000×100=600,000
600,000÷3=200,000
So $200,000