Question 875844
the score on your final exam will be found by using the following equation.


.30 * 42 + .30 * 50 + .40 * x = 60


simplify this equation to get:


12.6 + 15 + .40 * x = 60


subtract 12.6 and 15 from both sides of this equation to get:


.40 * x = 60 - 12.6 - 15


simplify to get:


.40 * x = 32.4


divide both sides of this equation by .40 to get:


x = 32.4 / .40 which becomes:


x = 81


you need an 81 on final exam in order to get an overall grade of 60% from your grades.


.30 * 42 + .30 * .5 + .40 * 81 = 12.6 + 15 + 32.4 = 60


your answer is confirmed as good.


you need an 81 on your final exam.