Given a quadratic function, f(x)=ax^2+bd+c has a positive leading coefficient and the vertex that has a positive y-coordinate. Determine the number of real zeros of the function.

What is the missing constant term in the perfect square that starts with x^2 -20x

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation,and the determine the cost if he drove it70 miles.b) what would be the cost of a car rental if the car was driven 250 miles? show work