Answer:
The number of observations is 15.
Answer:
Because anything divided by 0 is undefined. For example, 7/0 is undefined because 7 is being divided by 0 and that cant happen.
Answer:
x=9, y=15. (9, 15).
Step-by-step explanation:
y=2x-3
y=x+6
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2x-3=x+6
2x-x-3=6
x-3=6
x=6+3
x=9
y=9+6=15
First answer is correct because angles DAB and EAD equal 180 degrees (supplementary)