Amanda and sandy found seashells along the shore. amanda found eight shells, and sandy found twice as many. how many seashells did sandy find?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Given that abcd is a rhombus, what is the value of x?

The graph of f(x) is obtained by reflecting the graph of f(x)=-3|x| over the x-axis. which equation describes f(x)? a) f(x)=3|x| b) f(x)=|x+3| c) f(x)=-3|x| d) f(x) = - |x+3|