Answer:
x^2+9x−1/10
hopefully this helps, it's just writing it backwards
<span>(x^(2)-3x-54)/(x^(2)-18x+81)*(x^(2)+12x+36)/(x+16)
</span>
<span>
</span>
<u>Answer of question (1):</u>
The given speed = 12250 m/hr (meters per hour)
It is required to find speed in m/s (meter per second)
∵ one hour = 60 minutes = 3600 seconds
∴ speed = 12250 ÷ 3600 ≈ 3.4 m/sec (meter per second)
===================================================================
<u>Answer of question (2):</u>
Distance = 75 km
Time = 15 hours
Average speed = Distance ÷ Time = 75 ÷ 15 = 5 km/hr (kilometer per hour)
===================================================================
<u>Answer of question (3):</u>
Distance = 25 km
Time = 2.5 hours
Average speed = Distance ÷ Time = 25 ÷ 2.5 = 10 km/hr (kilometer per hour)
===================================================================
<u>Answer of question (4):</u>
Speed = 800 km/hr
Distance = 4000 km
Time = Distance ÷ Speed = 4000 ÷ 800 = 5 hr.
Answer:
7a true
7b false
7c true
7d false
Step-by-step explanation:
hope this helps........ can you give brainlyist