An employee at the College Bookstore was restocking the shelves before the start of a new term. Michelle is trying to figure out how many items were bought. The notebooks were
bought for $5 each and the packs of pens were $3 each. If there are 97 items, and the total
spent on the supplies was $381, find out how many of each item (notebooks and pen packs)
were purchased.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

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