The two lines graphed below are parallel. How many solutions are there to the system of equations?
A. Infinitely many
B. One

C. Two
D. Zero

Which function is represented by the graph

Which of the binomials below is a factor of this trinominal? x^2-13+30

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.