answersLogoWhite

0


Best Answer

(77+83+89+86+x)/5=85

(335+x)/5=85

(335+x)=85*5

335+x=425

x=425-335

x=90

He must get 90% on his fifth test to average 85%.

User Avatar

Wiki User

βˆ™ 2010-06-16 19:15:18
This answer is:
User Avatar
Study guides

Algebra

20 cards

A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

➑️
See all cards
3.8
β˜†β˜…β˜†β˜…β˜†β˜…β˜†β˜…β˜†β˜…
2575 Reviews

Add your answer:

Earn +20 pts
Q: What score must he get on his fifth test to average 85 percent for all five tests if his first four scores were 77 percent 83 percent 89 percent and 86 percent?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What percent of basketball games are won by the team that scores first?

50%


A student scores a 60 in the first test of a semester.In the last test he scores 75. Then by what percent has he improved?

There is a 25% improvement.


What percent is two fifth of sixty?

first of all i dont know. second of all use a calculator


A first magnitude star is times brighter than a 5th magnitude star?

For apparent magnitudes, a magnitude of zero has the same magnitude as Vega. A first magnitude star is 40 percent as bright and a fifth magnitude star is one percent. So, a first magnitude star is 40 times as bright as a fifth.


The average of 9 results is 50 The average of first four results is 52 and average of last 4 results is 49 What is the fifth result?

46


What if your test grades are 83 94 86 and 91 what grade fo you need to earn on your next test to have an average of 90?

An average is worked out by dividing the total of the scores by the number of scores. You have 4 scores already so when you have done the next test it will be 5 scores. If you multiply 5 scores by 90 it gives you a total score of 450. The 4 scores you already have adds up to a total of 354. If you subtract 354 from the 450 you get 96 and that is your target for the final test. The average for the first 4 tests comes out at 88.5


What is the average i need to get a 70 percent in class and i have 64 69 73 on three tests?

-- To average 70 on four tests, the total of the scores has to be 280 .-- You already have (64 + 69 + 73) = 206 on the first three tests.-- You need (280 - 206) = 74 on the fourth one in order to average 70 on all four.You can do it !Is that kind of what you were asking ?


What is the 120 percent of 300?

120 percent of 300 is 360. You first take out the 100 percent; that is 300. You now have 20 percent left, which is a fifth, so you divide 300 by 5, which equals 60, and add that to 300. 300+60= 360.


If you have two 100 percent and 89 percent what is average?

first, add 200%+89%=289%. then divide by two and you get 144.5%


Laura’s bowling five games. Her first four scores for 146, 135, 113, and 126. End up with an average score of at least 132.4, what is the lowest score of Laura will need in the fifth game?

423%2BS=600 Solve that to complete the problem. Let +x+ = her 5th score [ average of scores ] = [ total of scores] / [ number of games ] +120+=+%28+115+%2B+84+%2B+123+%2B+101+%2B+x+%29+%2F+5+ +600+=+115+%2B+84+%2B+123+%2B+101+%2B+x+ +600+=+423+%2B+x+ +x+=+600+-+423+ +x+=+177+ The lowest score Laura will need in the fifth game is 177


An arithmetic student needs at least a 70 percent average to receive credit for the course If she scored 86 percent 77 percent and 64 percent on the first three exams what is the lowest score she?

53 percent


Jancie scored 73 on her first four tests of the term. What would she have to score on the fifth test to have an average of 75 on the tests?

78

People also asked