Simplify the expression. If not possible, write simplified. 4b + 5b a. simplified c. 1b b. 20b d. 9b Please select the best answer from the choices provided A B C D

Bring the fraction a/a-4 to a denominator of 16-a^2

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

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each