Answer:
15
Step-by-step explanation:
1 hr: 5
2 hr: 10
3 hr: 15
Part A: He spends an average of $8.50 per day
Part B: He would save $17 per week
The second hot-air balloon is moving 5 m/s
y = x²+3
y = 3x+1
x² + 3 = 3x +1
x² - 3x + 2 = 0
(x-2)(x-1) = 0
x = 2, 1
Two solutions
(2,7) and (1,4)