several psychology students are unprepared for a surprise true/false test with 10 questions, and all of their answers are guesses. find the mean and standard deviation for the number of correct answers for such students. g

Asystem of linear equations contains two equations with the same slope. select all of the correct statements. i a. the system may have two solutions. - b. the system may have infinitely many solutions. c. the system may have one solution. o d. the system may have no solution. submit

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.