Add the equations.
2x - 3y = -1
+ 3x+3y= 26

Select the correct answer from each drop-down menu. rewrite the formula to find voltage. the formula for electrical power (p, in watts) is where v is the voltage in volts and r is the resistance in ohms. for a particular brand of water heater, r is 32 ohms and p is 0.5 watts. the formula to find v is , and the voltage at which the heater operates is volts.

What are the values of each variable in the diagram below?

Math i have no idea how to do a and b