Help with a Motion Problem.?

Question

I am working on applications of rational expressions and comples fractions. I have no clue how to set this problem up to solve it. Can you help?
A plane flies 720 mi against a steady 30-mi/h headwind and then returns to the same point with the wind. If the entire trip takes 10 h, what is the plane's speed in still air?

Answer 1

distance=rate * time
Therefore, 720/(x-30)+720/(x+30)=10
Solve this problem and you will have your solution.

Answer 2

ok so the 720mi / (x+30mi/h) = time to there
720mi / (x-30mi/h) = return time
720 / (x+30) + 720 / (x-30) = 10hours
720(x-30) + 720(x+30) = 10(x+30)(x-30)
720x - 21600 + 720x + 21600 = 10x^2 - 9000
x^2 - 144 - 900=0
(144 +- sqrt(17136)) / 2
find those two solutions and the positive one is the planes speed in still air, so x = speed with no wind, sry got no calculator on me.

Answer 3

i think of u r laid low with constipation. this could lead on directly to Piles, Haemorrhoids and fissures in a quick time from now. So, boost fibre intake. upload extra end result and vegetables, as properly to complete grains and bran, to the burden loss plan. including fibre to the burden loss plan progressively would help cut back gas and bloating. decrease lower back on extreme sugar, extreme fat and low-fibre ingredients collectively with meats, cheeses, ice cream, and processed ingredients. Drink lots of water (approximately 8 complete glasses an afternoon, filtered is terrific). A litre of water consistent with 20 kg bodyweight is mandatory to all consistent with day As fibre intake is extra desirable, fluid intake would additionally would desire to be extra desirable as properly. consume on a huge-unfold schedule to offer the physique a raffle to regulate removal. reply to the physique's organic alerts to bypass stool. this would save bowel movements huge-unfold. workout is an considerable factor interior the administration of constipation. huge-unfold workout (enormously abdomen muscle workouts) and brisk strolling are counseled in accordance to the age and actual situation of the guy. under no circumstances withhold urination.