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1. The graphs of the equations 3ax-4by=5 and 7ax-3by=-1 intersect at the point (-2,5). Find the value of ab.
2. Given that x-y=8 [Hint: Square both sides of the equation] and y=6/x, find the value of x^2+y^2.
3 LAST BUT NOT LEAST!
Snoopy decided to fly his Sopwith Camel looking for the Red Baron. The rate of his plane in still air is 300km/h. After flying 900km with a tail wind, he gets a call to return to base. On the return trip, flying against the same wind, he traveled two-thirds of the distance back to the base when he had to make an emergency landing to refuel. If he flew the same amount of time against the wind aswith the wind, how many km/hr was the wind blowing? [Reminder, Time=distance/rate and the rate of the wind must be taken into account in both directions.]
thnx<3
thank you jane ur a life saver. i would of never found that.:D
if the square root of x + the square root of y = the square root of 10 and x-y=5squarerootof2, find the value, in simplest radical form, radical x- radical y.
[Hint: Look for a conjugate binomial relationship. Use that relationship to write an equation that you can solve.]
thanks sooo much all of you fabulous repliers...i owe you my life...lol
Thank You Jane Fairfax! you have completely made my day<3
I have no idea where to even start on this problem.:o can someone help? and please use the hint because i need some work that will match up with that.
If x^25=4096+4096i and x^23=2048-2048i, find the numerical value of x^2
[hint: determine the relationship between x^25,x^23, and x^2. Use that relationship to write an equation. Reduce, if possible. Be sure to rationalize your denominator.
Its okay if i cant get an answer, just some steps would be amazing!!!
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