Answer:
1/2
Step-by-step explanation:
Square root as a exponent or power with a base is 1/2.
z^1/2 = √z
a=12
7a+18=102
7a=102-18
7a=84
a=84/7
a=12 <----- answer
rate the deck I will destroy anyone
x+2*y-(4)≤0
5<-50