Which of the following equations represents a quadratic function?
1.y(y + 4)(y - 6) = 0
2.(2x - 3)(4x + 5) = 10x
3.(3b)(5b – 7)(b + 8) = 0

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?

Construct the graph that models the given situation

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score