She got the given variable

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|

Match each equation to the ordered pair that represents one of its solutions. 3x + 2y = 6 -5x + y = -10 x ? 4y = 8 -6x ? 5y = 30 ordered pair equation (0, -6) arrowboth (0, 3) arrowboth (4, -1) arrowboth (1, -5) arrowboth reset next unit 2 - pretest

2. a family eats at a restaurant. the bill is $42. the family leaves a tip and spends $49.77. a. how much was the tip in dollars? b. how much was the tip as a percentage of the bill?