The solutions of given equation are -3, -1 and 3.
The most efficient way to solve this problem is isolating the y in the first equation because:
6x + 3y = 27
3y = 27 - 6x
y = 9 - 2x
Since all the numbers have a common factor of 3, it can be easily simplified/reduce.
If you used any other variable, you would have gotten a fraction.
Now that you found y, you can substitute it into the other equation to solve for x.
ANYWAYS, your answer is A
Please write down the quest so I can help you
Answer:
0.13774 inches ( approx ).
Step-by-step explanation:
Given,
The age of earth = 4.6 billion years = 4600000000 years,
The represented age of earth = 63,360 inches,
That is, scale factor in representation of age
Now, the age of human civilization = 10000 years,
Thus, the represented age of human civilization = actual age × scale factor
Well 30m for 50 km so 900/50 is 18 is 9 hours so it would take 9 hours