Afamily went to an amusement park and paid $12 for each adult and $8 for each child. a group of 15 people went to the park and it cost $140. this system of equations models this situation, where x is the number of adults and y is the number of children.
how many children were in the group?
x + y = 15
12x + 8x = 140

Areflection of shape i across the y-axis, followed by a , and then a translation left 6 units and down 4 units confirms congruence between shape i and shape ii. alternatively, a of shape ii about the origin, followed by a reflection across the y-axis, and then a translation right 4 units and up 6 units confirms congruence between shape ii and shape i.