the introduction of the variable z means that the graphed functions now represent planes, rather than lines. the substitution method involves solving for one of the variables in one of the equations, and plugging that into the rest of the equations to reduce the system.
Answer:
important to the economy of Ethiopia as a diversification from agriculture. Currently, mining comprises only 1% of GDP. Gold, gemstones (diamonds and sapphires), and industrial minerals are important commodities for the country's export-oriented growth strategy. Tantalum mining has also been profitable
There are 4 main rivers in the country turkey:
Aras, kura, Euphrates, and Tigris
