Blake's mistake is (d) He divided the exponents in the parentheses instead of subtracting.
<h3>How to determine the mistake</h3>
The expression is given as:

The actual solution is as follows:

Add the exponents

Multiply 15 by 5

Blake's simplified expression showed that:
He divided 12 by -3 and then multiplied the result by 5
Hence, Blake's mistake is (d) He divided the exponents in the parentheses instead of subtracting.
Read more about expressions at:
brainly.com/question/4344214
Answer:
Whats the question?? if its ratios then 4:4 and if its fractions red: 4/8 and green:4/8
Explanation:
Olfactory receptors are structurally defined to form columns of cells in the olfactory epithelium of the nose.
<h3>What are olfactory receptors?</h3>
Olfactory receptors are nerve cells found in the nose that receive stimuli (smells) from the surrounding environment.
Olfactory receptors are elongated-shaped cells that form columns on the olfactory epithelium in the nose.
In conclusion, olfactory receptors are structurally defined to form the olfactory epithelium in the nose.
Learn more about olfactory receptors here:
brainly.com/question/4550996
#SPJ1