If a final examination in a course is weighted 3 times as much as a quiz and a student has a final examination grade of 85 and quiz grades of 70 and 90, what is the mean grade.

Me find the measure to side a and the process to solve the problem you appreciate it : )

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

What are the solutions of the following system? y=-2x^2 y=x-2