exam Maths Puzzle Numerical Ability

One beautiful morning, Kristen starts at the rim of the Grand Canyon and hikes down to Phantom Ranch on the Colorado River, arriving in the afternoon. The next morning, she leaves

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exam Other Question

really need help on this one!
Find the solution to the equation: (5/x+5)+(x/x+3)+(1/x^2+8x+15) = 0
the choice of answers given are: {-4,-3} {-5,1) (-8,-2} and empty set A space shuttle 240 miles above the earth orbits the earth every 5 hours. How far (to the nearest 10 miles) does the shuttle travel in 1 hour? ( The diameter of the earth is approximately 8000 miles)[Theta=s/r]