What are the two types of simple machines in this compound machine?

lever, wheel and axle

lever, pulley

screw, incline plane

screw, lever

Which two molecules do green plants use to make glucose? o a. nitrogen and water o b. hydrogen and oxygen o c. carbon dioxide and water o d. methane and iron oxide

In which state was more than 100 billion tons of coal mined in 2005?

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are