X>0, y>0, 2x+3y=8, smallest value of xy? pls help me

Which expression is equivalent to 2x^2+7x+4?

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field