Could a quadrilateral have 4 obtuse angles? why?

5/6+7/8what is the answer sealsdbdbshd

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

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?