Convert the given system to an augmented matrix. 2x1 + 2x2 − x3 = 9 −x1 − x2 = −2 3x1 + 3x2 + x3 = 1 2 2 −1 9 −1 −1 0 −2 3 3 1 1 2 2 −1 9 −1 −1 −2 0 3 3 1 1 2 2 −1 9 −1 −1 0 2 3 3 1 1 2 −1 3 2 −1 3 −1 −2 1 9 0 1 2 −1 3 2 −1 3 −1 0 1 9 −2 1 correct: your answer is correct. find all solutions by reducing the system to echelon form and back substituting. (if there are an infinite number of solutions use s1 as your parameter. if there is no solution, enter no solution.) (x1, x2, x3) = incorrect: your answer is incorrect.

sorry, i don't know i just need points, i'm new here. chao

based on context clues you gave i'm assuming the answer would be c.

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.