Helllp please fassttt plzzz?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )