Half of a number is added to four. This sum is equivalent to negative one.

Solve the system by the elimination method. 2x + y - 4 = 0 2x - y - 4 = 0 when you eliminate y, what is the resulting equation? a.x = 0 b.4x = -8 c.4x = 8

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Which inequality has a dashed boundary line when graphed ?