For what values of x is the function f(x)=x^2-4x-5 increasing

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?

Prove that 16^4-2^13-4^5 is divisible by 11.