-2x+y=5
-7x+9y=56

I don't know the answer, and I don't understand the material.

Solve the x in the equation x^2+14x+17=-96

The difference between tax advoidance and tax evasion

Aresearch group wants to find the opinions’ of city residents on the construction of a new downtown parking garage. what is the population of the survey downtown shoppers downtown visitors downtown workers city residents