Simplify and reduce. show the work. ^= an exponent of 2 and 0 (-2 3/4 + 1 2/3)^2 - (-7/9)^0

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?

If there is 20 dogs in the shelter and 5 dogs get homes, and then 43 more dogs come. how many dogs are there in the shelter?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2