John is 6 years younger than David. henry is 3 times younger than david. the total age of all 3 is 43. how old is david?

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

The outermost layer of your teeth is called the enamel and is made of?

Bacteria can cause different infections, check all that apply. a. sore throat b. measles c. ear infection d. flu e. cavities