The graph of f(t) = 4.2^t shows the value of a rare coin in year t. what is the
meaning of the y-intercept?

49xy +34y - 72z. determine the degree of the polynomial

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?