Evaluate each expression (-1 7/8) + (-3 1/2)=

What is the gcf of 20c^3-5c^4+30c^6

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]

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?