Where did the Aztecs build their empire? My answer options are : Lake Erie, lake texcoco, Lake Michigan, or the rio grande

Describe the relationship between the angles of similar triangles and the sides of similar triangles

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

1: 4 if the wew 35 surfboards at the beach how many were short boards?