Answer:
27
Step-by-step explanation:
17 - 8 = 9 people came
The number of presents brought is 3×9 = 27.
Jackie got 27 presents.
It's a reflection over the y axis because 'a' represents 'x' and if 'a' is negative it flips to the other side leave 'b/y' to remain the same
Math helps with science because you'll need to know the math in order to convert units in science.
no solution, since the graph two parallel lines with no intersect
