What is 55900 rounded to the closest million

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]