Solve the system of equations.
y = 7x - 9
y = 7x + 7
a. (-4,1)
b. (-4,-1)
C. (4.1)
d. No solution

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Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits