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What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.