It is 39^2 or 1521, not sure which one you want.
Answer:
z = -1
Step-by-step explanation:
You must first start out by adding 19 to both sides to isolate the variable z, which results in:
2z = -2
Now, you can just divide by two on both sides to get z completely on its own, which gives you:
z = -1
Hope this helped somewhat! :D
The answer is b hope this helps
It’s A, as you can tell from my picture
