Which equation shows the substitution method being used to solve the system of linear equations? x – y = 7 x = y 3 a. x – y = y 3 b. x = (7 – x) 3 c. (y 3) – y = 7 d. x – (y 3) = 7

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

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

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?