Josh earned a total of x in his math class last marking period. The number of points he earned in each of four categories was divided as follows. homework= 1/5 of total points, quizzes= 1/4 of total p

Josh earned a total of x in his math class last marking period. The number of points he earned in each of four categories was divided as follows. homework= 1/5 of total points, quizzes= 1/4 of total points, tests= 1/2 of total points, classwork= __ of total points. Josh knows he can determine the number of points earned for classwork by evaluating expression 1x-(1/5x+1/2x+1/4x). He says he can also use the expression 0.5x to determine the number of points earned for classwork more easily. Is Josh correct? Explain your reasoning.