Help me help me going tight mabye next friday night going for a plane ride

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x