49 ! match the correct answers.   1. 3d figure where all points are the same distance from the center 2. 3d figure made of all triangles 3. 3d figure with six congruent squares 4. 3d figure with two triangle bases and rectangles for the rest of its faces 5. 3d figure with two circular bases 6. 3d figure with a rectangle as a base and triangles for the rest of its faces 7. 3d figure with one circular base and one vertex 8. 3d figure with rectangles for all of its faces   1. rectangular pyramid 2. triangular pyramid 3. cube 4. sphere 5. cone 6. triangular prism 7. cylinder 8. rectangular prism

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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answers

rauschg

rauschg · hand

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step-by-step explanation:

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: