Question from test: no calculator allowed, how do you do this?

1.) if 3^5x+1 = 11 then x=? (yes, the 3 is raised to 5x+1.)

Hassan bought a package of tofu. the temperature of the tofu was 14° celsius when hassan put the package into the freezer. he left the tofu in the freezer until it reached –19° celsius. which expressions explain how to find the change in temperature, in degrees celsius, of the package of tofu? select three that apply.