Akayaker travels x miles per hour downstream for 7 hours. on the 10-hour return trip, the kayaker travels 3 miles per hour slower. how far did the kayaker travel in total?

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.