PLEASE HELP ON A TIMED TEST

Find the common ratio for the geometric sequence: 0.4, -1.2, 3.6, -10.8, . . .

Rose drew a regression line for this paired data set. her line passed through (1, 2) and (3, 5) . what is the equation of rose's regression line?

Part of the total score for each program is the sum of five program component scores. on the free program, the sum of these five program component scores is multiplied by a factor of 2.0. yuzuru hanyu, of japan, earned scores of 9.07, 8.96, 8.89, 9.21, and 9.36 for the program components portion of his free program. how many total points did he receive for this portion?

What is a rational number between 9.5 and 9.7