Question

Can someone explain what to do please

Answer 1

just combine the equations
if t=.3m^2 (m equals 4)and the second equation is r=150+5t then the full equation would be: r=150+5 (.3 (4)^2)
then r = 150+5(.3 (16))
r=150+5 (4.8)
r=150+24
resistance equals 174 ohms