Don't quite follow this one but it looks like ...
m-2.j=7x
m-3.j=3x+20
as a pair of simultaneous equations ???
The answer is true
i think
<span>The correct answer is plate tectonics. The outermost shell of Earth, called the lithosphere, is partitioned into different tectonic plates (7 or 8 major ones). When a plate breaks along what are called faults, there is a release of energy, which causes seismic waves (the ground shaking). This shaking then causes several plates to rub against each other, and when they break, the earthquake results.</span>
The correct answer is C. Composite cones. Hope this helps (:
I think the two sources would be drip irrigation which is like a river, lake, groundwater, etc... The second source could be is making a new irragation system that could deliver water faster.
