Answer:
105 hours
Step-by-step explanation:
→ Find how many days in a week
7
→ Multiply this by his gaming time
7 × 15 = 105
You'll be solving:
-5t^2 + 20t + 15 = 3t + 3
5t^2 - 17t - 12 = 0
(t - 4)(5t + 3) = 0
t = 4 or t = -3/5, but let's assume t ≥ 0
Step-by-step explanation: