A runner and a walker begin on a track (oval shape) 1 mile in length at the same spot and depart in opposite directions. The runner goes steadily at 9 mph while the walker goes at a steady 3 mph. How long before they meet again?
Are these two answers correct? They are both true or false. Mendeleev was able to predict undiscovered elements. True The noble gases are chemically reactive under normal conditions. False (I don't know what is considered "normal conditions")
humans have a double circulation system. there is a low pressure circulation and a high pressure circulation. (a) explain how the structure of the heart enables it to pump blood into two circulations at different pressures
1. Which word belongs in the blank? ______ compro el libro a Ana. a) La b) Le (MY ANSWER) c) Lo d) Ella 2. He brings us a cake on Sundays. a) Nos trae un pastel...(MY ANSWER) b) Me trae un pastel... c) Les trae un pastel... d) Os trae