6x + 1.6 =58 ? two step equations

Graph the system of equations. {6x−4y=−244x−8y=−32 use the line tool to graph the lines.

What is the value of -3/4 to the 4th power? -256/81 -81/256 81/256 256/81

Which expression equals 9^3 sqrt 10 a. 5 sqrt 10 + 4 sqrt 10 b. 5^3 sqrt 10 + 4 ^3 sqrt 10 c. 5 sqrt 10 + 4^3 sqrt 10 d. 5^3 sqrt 10 + 4 sqrt 10