Please help me, solve for x tysm whoever does it without trollling or just answers to get points

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

Find the maximum value of p= 4x + 5y subject to the following constraints :

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.