Desmos Graphing Calculator
Math·Algebra·Linear inequalities in one or two variables
hardWhen several resistors are connected in series in a circuit, the total resistance of the circuit is the sum of the resistances of these resistors. A certain circuit consists of 8 resistors connected in series, where the resistance of each resistor is positive. This circuit has a total resistance of 130 ohms. The total resistance of 3 resistors in this circuit is 90 ohms. Which inequality best represents all possible values of the resistance x, in ohms, of one of the other 5 resistors in this circuit?
A
0<x<8
B
0<x<40
C
40<x<90
D
40<x<130