Solve the problem.An electrical circuit contains two resistors connected in parallel. If the resistance of each is R1 and R2 ohms, respectively, then their combined resistance R is given the formula R = If their combined resistance R is 2 ohms and R2 is 9 ohms, find R1.

A.  ohms
B. 7 ohms
C.  ohm
D.  ohms


Answer: D

Mathematics

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Mathematics