Given: D is a point on AC and E is a point of CB. DE // AB Prove: ACDE - ACAB
1. D is a point on AC and E is a point on CB, DE is parallel to AB
1. Given

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

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?

What are the excluded values? m+5/mn+3m