If c is the measure of the hypotenuse of a right triangle, how do you find each missing measure given a=x, b=x+7, c=97?
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"A 5.00 L sample of helium at STP expands to 15.0 L. What is the new pressure on the gas?"
1 Answer
Feb 26, 2017
Explanation:
By pythagorean theorem, we have
#a^2 + b^2 = c^2#
#x^2 + (x + 7)^2= 97^2#
#x^2 + x^2 + 14x + 49 = 9409#
#2x^2 + 14x - 9360 =0#
#x^2 + 7x - 4680 = 0#
#x = (-7 +- sqrt(7^2 - 4 * 1 * -4680))/(2 * 1)#
#x = (-7 +- 137)/2#
#x = -72 and 65#
Obviously, a triangle with negative lengths is impossible. Therefore, we have that
Hopefully this helps!
