2c+5=c+8
2c-c=8-5
1c=3
c=3/1
c=3
3 7/10 + 5 4/10 = 8 11/10 = 9 1/10
so estimate = 9
actual answer = 9 1/10
yes, his answer is reasonable
Just do 7 total hours minus the 2.6 hours he needs left to complete the 7 hours. ezpz
answer is 50, it takes 50 cards to fill up one box