Mona is four years older than Karly.
1 answer:
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Assuming health non-mutated animals:
By back substitution:
Then:
To check:
CHECKS
By back substitution:
Then:
To check:
Isolate z by itself:
To simplify variables with powers, subtract the smaller power from the bigger power:
The exponent will be -3.
To simplify variables with powers, subtract the smaller power from the bigger power:
The exponent will be -3.