Eva is showing her work in simplifying (7.3 – 7.2) – 3.8 + 3.7. in which step did eva make an error?

step 1: (7.3 – 7.2) – 3.8 + 3.7

step 2: 7.3 + (–7.2 – 3.8) + 3.7 (commutative property)

step 3: 7.3 – 11 + 3.7

step 4: 7.3 + 3.7 – 11 (commutative property)

step 5: 11 – 11 = 0
step 2; she wrote commutative instead of distributive
step 4; she wrote commutative instead of distributive
step 4; she wrote commutative instead of associative
step 2; she wrote commutative instead of associative

Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.