Question 26263
Walking speed is xmph
Jogging sppeed is 2xmph
Total distance for jogging is 2miles.
TOtal distance for walking is 2 miles.
And total SUM of these two gives the time to be 1 hour.
Expression:
{{{2/2x+2/x=1(2x)(x)}}}
2(2x+x)=(2x)(x)
{{{2(3x)=2x^2}}}
{{{6x=2x^2}}}
{{{2x^2-6x=0,x}}}
{{{x^2-3x=0,x}}}
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x=(-(-3)+-sqrt((-3)^2-4*1*0)))/(2*1)}}}
{{{x=(3+-sqrt(9))/2}}} REMOVE "-"
{{{x=(3+3)/2}}}
x=3
2(3)=6


Hence, the walking rate was 3mph and the jogging rate was 6mph.
Paul.