Please help thanks .. Given a quadratic function, y=ax^2+ bx+c. what happens to the graph when "a" is positive?

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Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)

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