1: A or 2. Mode is most common, so highest on the chart going upward 2: 2. mean is average. add them and divide by the number of people asked in the pole 3: 34. Median is the middle number when the data is put in order. For this it is 33 and 35 so you find the average of the two and get the answer 4: C and D. the percentages are incorrect because the total number of people is 75 not 100. 5: D (or maybe C) i dont really know what your teacher wants, but its definitely one of the two. You probably know what your teacher says in class better than me so use your own judgement on this one. Hope this helps!
Consider the augments matrix (the right most column is the extra vector).
By multypling the first row by 3 and substracting it from the second row and saving the result in the second row we get the matrix
Note that since the value of the third column in the second row is 0, any value of h gives us a consistent system. An inconsistent system is when we get a row of zeros that is equal to a number different from 0.