System of equations and its solution are given below.

system a

5x - y= -11
3x - 2y=-8

solution (-2,1)

to get system b below, the second equation in system a was replaced by the sum of that equation and the first equation in system a multiplied by -2.

system b

5x - y = -11
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Question 9 of 10 2 points suppose your sat score is 1770. you look up the average sat scores for students admitted to your preferred colleges and find the list of scores below. based on your sat score of 1770, which average score below represents the college that would be your best option? o a. 1790 o b. 2130 o c. 2210 od. 1350

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.

Student representatives surveyed their classmates on their preference of a school mascot for a new school. the results are shown in the table below. which pair of samples seems most representative of student preference?