If the mean of the four nurnbers 4, 8, x and
12 is 0, chen x is

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.

Could someone me with this question i’ve been stuck on it for 20 minutes

A+b= 17, ab=70, find the value of |a-b|