What are the missing numbers in the sequence?

Select the term that describes the linear portion in this quadratic equation 7x^2-12x+16=0 a) -12x b) 7x^2 c) 16

Abuilder divides a rectangular plot in half along the diagonal. if the plot is 1\2-mile wde and the diagonal measures 1 3\10-miles long, what is the length of the plot?

The result of which expression will best estimate the actual product of (-4/5) x (3/5) x (-6/7) x (5/6) (i need an expression not an answer)