Hello!
Answer: (-6,8)
A coordinate graph might help.
Hope I helped in time!
Good luck!
~ Destiny ^_^
20(4) +6(6) = 80 +36 = 116 total building time
20(4) +6(4) = 80 +24 = 104 total testing time ( this is greater than the allowed 100 hours)
Answer is: No, because the bike order does not meet the restrictions of 4c + 6a ≤ 120 and 4c + 4a ≤ 100
16 and 4, 40 and 20 and also 32 and 8
The answer is 46.10 just look it up