11 pts. look at points c and d on the graph: coordinate grid shown from negative 6 to positive 6 in increments of 1 on both the axes. a line is drawn by connecting point c at negative 4, negative 5 and point d at 4, 3. what is the distance (in units) between points c and d? round your answer to the nearest hundredth. (multiple choice below) 2.83 units 4.00 units 11.31 units 64.00 units

Distance formula =√((x2-x1)² + (y2 - y1)²)

Distance between C and D = √((4-(-4))² + (3-(-5))²) = √(64 + 64) = =√(2*64)=8√2≈11.31 units

Answer is 11.31 units.

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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