X -2 0 2 4
y -4 -3 -2 -1

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?