The function c=2.50(n-2)+4.50 represents the cost c in dollars of printing n invitations. which of the following is not true

What is the slope of a line that is perpendicular to y = 3x + 1

Find the vertex of the function given below y=x^2-6x+1

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?