Can an expert check my work to see if it right? pls and ty please actually CHECK it pls this is due in a few mins

Collin did the work to see if 10 is a solution to the equation r/4=2.4

The correlation coefficient between the number of students and marks obtained in end semester exam. (13 marks) give the statistical meaning of the relationship between the number of students and marks b. obtained in end semester exam. (3 marks) draw the number of students and marks obtained in end semester exam scatter diagram c. (4 marks) check list write your name and id corectly write the question number properly use your own calculator. show all the steps to solve the problems. use the correct formula. answer in provided time. don't use your mobile for any purpose. write your answer up to two decimal places

Use long division to indentify (12xto the second power+15x-8)divided by 3x