1.Решите уравнения: а) 2х2 + 7х -9=0; в) 100х2 – 16=0; б) 3х2 =18х; г) х2 -16х+63=0. 2. Произведение двух натуральных чисел, одно из которых на 6 больше другого, равно 187. Найдите эти числа. 3. Найти сумму и произведение корней квадратного уравнения 4. Составьте квадратное уравнение, если его корни равны -1 и 8. 5. Найдите корни уравнения: а) (3х-1) (х+3)= х (1+6х); в) (х+3)(х-4)= -12; б) (х+4)2 = 3х+40. г) ( 3х-1)2 -1= 0.

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