Which expression is equivalent to 3 square root x^5y

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

10x − 5y + 14 = 0 whats the answer pls