The pathagorean theorom always works
Answer:
7) -3
8) B
Step-by-step explanation:
David spent $172.
The first concert he went with 1 friend including himself so
32+32=64
The second concert he went with 2 friends including himself so
64+18+18+18=118
The third concert he went by himself so
118+54=172
David spent $172 dollars with him and his friends on tickets.
