A 180° angle (straight line) is formed by two adjacent angles. One angle is (2x+3)° and the other is (x−6)°. What are the two unknown angles that make this equation true?(1 point)
Since the angles form a straight line, their sum will be 180°.
(2x+3)° + (x-6)° = 180°
Combining like terms and solving for x:
3x - 3 = 180
3x = 183
x = 61
Therefore, the two angles are:
(2x+3)° = (2*61+3)° = 125°
(x-6)° = (61-6)° = 55°
So the two unknown angles are 125° and 55°.
Hydroelectric power can have negative impacts on the ecosystem in several ways:
1. Habitat Alteration: Hydroelectric power plants require the construction of dams or diversion structures, which can alter the natural flow of rivers, flood large areas of land and displace wildlife in the process.
2. Fish Migration: Dams also prevent fish from migrating upstream to spawn, affecting fish populations and reducing biodiversity.
3. Water Quality: Stored water behind the dam may have higher temperature and lower oxygen levels compared to free-flowing rivers, affecting the quality of the water and making it difficult for aquatic species to survive.
4. Sedimentation: Dams block the flow of sediment downstream, causing erosion and the loss of fertile soil needed for agriculture and ecosystem health.
5. Methane Emissions: Reservoirs created by dams can release methane, a potent greenhouse gas, as organic matter decomposes in the water.
So, though hydroelectric power is a form of clean energy, it can have negative environmental impacts that must be taken into account.