# algebra

posted by .

if a student has an average of 8 after 20 tests and then gets a 0 on his 21st test, what would his new average be?

• algebra -

8 * 20 = 160

160/21 = ?

• algebra -

x = total score of tests

x/20 = 8
x = 160

160/21 = 7.62 new average

• algebra -

thank you.

## Similar Questions

1. ### math ( average)

a student wants to get an average of 80 on the 5 tests to earn an A grade.on the 4 test he gets 79, 88,64,78. how much should he score on the 5th test so that he gets this average of 80?
2. ### algebra

help me please... The expression for figuring a student's average test score is (p/t), where p is the total points earned on all the tests, and the t is the number of tests. find a student's average when 623 points are earned on 7 …
3. ### Algebra

A student is taking a literature course in which four tests are given. To get a B, he must average at least 80 on the four tests. The student got scores of 82, 76, and 78 on the first three tests. Determine (in terms of inequality) …
4. ### algebra

to pass a course with an A grade, a student ,must have an average of 90 or higher. A students grades on three tests are 93,92 and 83. What is the score the student must get on the nest test to get an A average?
5. ### algebra 1

princess leia is a very good math student. Her average math grade was a 95 on her 15 tests. If Darth Mangham decides to drop her lowest grade, write an expression to determine her new test average.
6. ### math

If a student scored an average of 60% on a test, what score would he/she need to average it out to a passing 80+. What formula would you use. This isn't a question on a test, it's one I've been trying to find. I am able to retake a …
7. ### math

A student had an average of exactly 84 marks after taking three tests. On the fourth test, he scored 96%. The average for all four tests is A. 84 B. 86 C. 87 D. 82
8. ### Tribhuwan

sheila has taken five tests so far this semester. if she gets a 70 on her next test, it will lower the average of her test scores by four points. what is her average now?
9. ### math

on two tests so far this year a student received a 78 and a 93 the student want an average between 80 and 90 inclusive what are all of the possible scores for the third test so that the student falls within this average
10. ### math

on two tests so far this year a student received a 78 and a 93 the student want an average between 80 and 90 inclusive what are all of the possible scores for the third test so that the student falls within this average I don't understand …

More Similar Questions