What are the vertex and x-intercept of the graph of the function below?

y=x^2-6x-7

Simplify the expression. -2/5(10+15m-20n)

Use sigma notation to represent the following series for 9 terms.

The price of a lawn mower is x dollars. the store is having a 75% end of summer clearance sale. which expression can be used to find the clearance price of the mower? a) .25x b) .75x c) x - .25(75) d) x + .25(75)