Their error is that they divided 12 by 30, instead of 30 by 12 in order to get the price per pair
the correct unit price is $2.50 per pair
2.5 * 12 = 30
Answer:
or 0.6
Step-by-step explanation:
Sorry don’t now the answer to this problem
Answer: The answer is (d) 
Step-by-step explanation: Given equation to be factored is

The given expression is quadratic, so we can factor it into two linear factors, by using the following factorisation rule.

So, the given equation can be factorised using the above rule. The factorisation is as follows.

Thus, the correct option is (d).