Which is the best estimate of 75.2 x 9?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Consider the first four terms of the sequence below. what is the 8th term of this sequence?

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]