Posted by maddy on .
two resistors are connected in parallel. their resistances are 8 ohms and 17ohms. what is the resistance of the combonation.

algebra 2 
Damon,
1/R = 1/R1 + 1/R2 = (R1+R2)/R1R2
so R = R1 R2 / (R1+R2)
= 8*17 /(8+17)