Tom is sketching the graph of a quadratic function. He is asking his friends about how many x-intercepts his function can have. Here is the feedback from his friends.
Allison says the graph can have 1 x-intercept.
Carson says the graph can have no x-intercepts.
Dolly says the graph must have two x-intercepts.
Erica says the graph can have, at most, 1 x-intercept.
How many of Tom's friends are right and why?
OO
1: Dolly is right because a quadratic graph has exactly 2 x-intercepts.
O 2: Allison and Carson are right because the graph can have 0 or 1 x-intercepts.
3; Allison, Carson, and Erica are right because the graph can have 0, 1, or 2 x-intercepts.
4; They are all right because the graph can have varying number of x-intercepts

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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h= 12 inches

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