The answer is a, this is because 5(2+4) is the same as multiplying 5 by 6 to get 30. The reason we do this is because the length of the entire side is the sum of the bottom numbers
<span>Los minerales se consideran gemas si son raros , clara y brillante.
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I assume you want the original price?
(37.90/9)*10 = $<span>42.11.... </span>