Girardo is using the model below to solve the equation 3 x + 1 = 4 x + (negative 4). 3 long green tiles and 1 green square tile = 4 long green tiles and 4 red square tiles

Girardo uses the following steps:

Step 1 Add 4 negative x-tiles to both sides
Step 2 Add 1 negative unit tile to both sides
Step 3 The solution is Negative x = negative 5

Which step could be adjusted so that Gerardo's final step results in a positive x-value?
In step 1, he should have added 4 positive x-tiles to both sides.
In step 1, he should have added 3 negative x-tiles to both sides.
In step 2, he should have added 4 negative unit tiles to both sides.
In step 2, he should have added 1 positive unit tile to both sides.

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average