The sets of ordered pairs below represent the cost to fix a plumbing issue based on the number of hours. The first coordinate represents the hours and the second coordinate the cost. Select the sets of ordered pairs that are proportional relationships. { ( 2 , 160 ) , ( 4 , 320 ) , ( 5 , 400 ) , ( 8 , 640 ) } { ( 2 , 160 ) , ( 4 , 320 ) , ( 5 , 400 ) , ( 8 , 640 ) } { ( 1 , 90 ) , ( 3 , 170 ) , ( 4 , 210 ) , ( 6 , 290 ) } { ( 1 , 90 ) , ( 3 , 170 ) , ( 4 , 210 ) , ( 6 , 290 ) } { ( 1 , 135 ) , ( 4 , 210 ) , ( 6 , 255 ) , ( 8 , 290 ) } { ( 1 , 135 ) , ( 4 , 210 ) , ( 6 , 255 ) , ( 8 , 290 ) } { ( 2 , 150 ) , ( 3 , 225 ) , ( 7 , 525 ) , ( 8 , 600 ) } { ( 2 , 150 ) , ( 3 , 225 ) , ( 7 , 525 ) , ( 8 , 600 ) } { ( 4 , 220 ) , ( 5 , 275 ) , ( 6 , 330 ) , ( 7 , 385 ) }

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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rauschg

rauschg · hand

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asdsaddsa

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move it to the other side

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option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: