Find the axis of symmetry and the vertex of the graph of $f\left(x\right)=-5x^2+20x-9$ . The axis of symmetry is $x=$ and the vertex is ( , ).

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Simply 8x squared + 5(7x squared- x) - 2x =

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude