SOLUTION: Your last quiz grades were 85, 76, 94 And 100. Set up and solve an equation to find the lowest quiz grade you can get in your next quiz and have an average of at least 90. How d

Question 838426: Your last quiz grades were 85, 76, 94 And 100. Set up and solve an equation to find the lowest quiz grade you can get in your next quiz and have an average of at least 90.
How do I complete this? I understand adding them up and dividing by the number of numbers added but I don't understand this word problem.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Your last quiz grades were 85, 76, 94 And 100.
Set up and solve an equation to find the lowest quiz grade you can get in your next quiz and have an average of at least 90.
:
Let x = the grade you need in the 5th test
=> 90
multiply both sides by 5, add up the values
335 + x => 450
x => 450 - 355
x => 95 (You must get 95 or greater in the 5th test)

RELATED QUESTIONS
I do not understand how to set up this problem. Your quiz grades are 73,75,89,and 91.... (answered by jim_thompson5910,stanbon)

Your quiz grades are 73,75,89 and 91.What is the lowest grade you can receive on the last (answered by checkley77)

your quiz grades are 73,75,89, and 91. what is the lowest grade you can obtain on the... (answered by lynnlo)

Your quiz grades are 73, 75, 89, and 91. What is the lowest grade you can obtain on the... (answered by texttutoring)

Your quiz grades are 73, 75, 89, and 91. What is the lowest grade you can obtain on the... (answered by checkley77)

How do i write this inequality: Your quiz grades are 19,17,20, and 15. What is the... (answered by checkley77)

your teacher wants to see if you can guess your two quiz grades. she tells you that the... (answered by solver91311)

Your test grades are 72,76,90 and 90. What is the lowest grade you can earn on the last... (answered by Simnepi)

Suppose your semester grade is determined as follows: 30% for Tests, 20% for the Final... (answered by solver91311)