A company makes two electronic circuit boards that require the same resistance. The Pro-X board runs on 120 volts, while the Pro-I board runs on 90 volts. If the current running through the Pro-I board is 15 fewer milliamps (mA) than the current running through the Pro-X board, how much current is running through each board? Which of the following rational equations bests models this situation?

60 mA and 45 mA

Step-by-step explanation:

Application of Linear Equations

The voltage V measured in a resistive element of an electrical circuit or resistance R is

Where I is the current flowing through the resistor. Solving for I

There are two electronic circuit boards that have the same resistance. The Pro-X board runs on 120 volts and the Pro-I board runs on 90 Volts. We know that the current running through this last one is 15 mA fewer than the current through the Pro-X board. It means

Rearranging:

Operating

Or, equivalently

Thus, the current through the Pro-X board is

And the current through the Pro-I board is

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step-by-step explanation:

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