Question #73790 Algebra Expressions, Equations, and Functions Problem-Solving Models 1 Answer Nityananda Feb 26, 2017 80 Explanation: Average marks = total marks #-:#total subjects #rArr (72+91+82+78+77)-:5# #rArr 400 -:5# #rArr# 80. Answer link Related questions What are the steps to solving a word problem? Where do I start when I'm trying to solve a word problem? How do you check a solution to a problem? What are the different strategies used to solve a word problem? What is the best method of determining the cost of downloading 26 movies, if it cost $2.25 to... How do you solve word problems involving percents? What are commonly used math terms that translates to addition, subtraction, multiplication, and division? How much pure antifreeze should be added to 3 gallons of a 30 percent antifreeze solution to get... How would you use equations to calculate the age of Al given that Al's father is 45 and he is 15... How do you solve #x=(y-1)/(y+1)# for y? See all questions in Problem-Solving Models Impact of this question 1069 views around the world You can reuse this answer Creative Commons License