gavin bought two iphone chargers. his reward at the store staples saved him $4. he only ha to pay $16. how much money did each iphone charger cost?

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.