Question 910613
Number 17:


___________________rate_______time________distance
A___________________r_________(___)_______d-p
B___________________s_________(___)________d


The time quantities are not clear and so are variables, unknowns.  You would be given r and s are constant, d and p are expected to also be known constants, and you only know that A and B start AT THE SAME POINT in time; but you do not know the time quantities.


Use simple algebra to help.
{{{RT=D}}}
{{{RT(1/R)=D(1/R)}}}
{{{T=D/R}}}


Now use this to fill in the missing time quantities expressions.


___________________rate_______time________distance
A___________________r_________(d-p)/r_______d-p
B___________________s_________d/s________d