Which equation results from adding the equations in this system? -2x+y=8 5x-y=-5

3 x = 3.

Value of x = 1 and y = 10.

Explanation:

-2x + y = 8

5x - y = -5

5x + (-2x) + y + (-y) = 8 + (-5)

∴ 3 x = 3.

∴ x = 1.

-2(1) + y = 8.

∴ y = 10.

answer: c.

explanation:

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.