You buy 30 of your favorite songs from a Web site that charges $0.99 for each song. What is the cost of 30 songs? Use mental m
1 answer:
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Answer:
n + y
Step-by-step explanation:
a² - b² = (a +b)(a - b)
÷
{ (n + y) in the denominator and numerator will be cancelled ;
(n - y) in the denominator and numerator will be cancelled
= n + y