Can somebody plz help me ASAP!!​

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

What is the measure of angle x? answer

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]