Answer is [happened before the present day].
Using irrigation system was the practice closely associated with most ancient river valley civilization.
Hey there!

The formula for the discriminant is represented by b²-4ac.
We need to identify the values for a, b, and c.
This equation is in general form, which is ax² + bx + c = 0.
So, a = -2, b = -1, and c = -1.
Plug the values into the formula.
(-1)²-4(-2)(-1)
Square.
1-4(-2)(-1)
Multiply.
1-4(2)
1-8
Subtract.
-7
The discriminant is -7.
This means there are no real solutions to the equation, because the discriminant is negative.
Hope this helps!
Both Sam Adams and John Hancock had anti-British sentiments. In the 1760s the British imposed regulatory measures in America so they could have greater authority over the region. John Hancock was influential and quite wealthy so he thought it was time to aid the American cause for independence from the British as he felt their influence in America was harming it.
The United States gained control of Texas after armed conflict with the forces of "<span>B. Antonio López de Santa Anna," since this was during a major territorial conflict with Mexico. </span>