6km in 2 hours =
6/2 = 3
so 3 km per hour
5x² - 9x + 45 = 0
Δ = b² - 4.a.c
Δ = (-9)² - 4 . 5 . 45
Δ = 81 - 4. 5 . 45
Δ = -819
There's no real root.
Answer:
Step-by-step explanation:
The lower bound is 10.5 and the upper bound is 15.9
Hope it helps!
