At what temperature will their resistances be equal?

Question

At 20.0°C, a mainly silicon resistor has a resistance of 585 Ω, and a tungsten resistor has a resistance of 752 Ω. At this temperature, the silicon resistor has a temperature coefficient of resistivity of −0.070°C−1 and the tungsten resistor has a coefficient of 0.0050°C−1.

Answer 1

The silicon resistors resistance is given by
585*(1 - .070(t-20)) and the tungsten resistor is
752*(1+ .005(t-20)) so set them equal and solve for t.

Doug