![jgrable5175](/avatars/43732.jpg)
jgrable5175
23.06.2019 •
Mathematics
Grading scale 2 has the following weights- tests- 60% quiz- 15% homework- 10% final exam- 15% what do you need to score on the final exam to make an 78 in the class if your grades are- show steps. test grades- 85 quiz- 87 homework- 68 final exam- ? ? a. 85(60) + 87(15) + 68(10) + x(15) = 78 x = 49.33 b. 85(6.0) + 87(1.5) + 68(1.0) + x(1.5) = 78 x = 53.62 c. 85(.60) + 87(.15) + 68(.10) + x(.15) = 78 x = 47.67 d. 85(.60) + 87(1.5) + 68(.10) + x(1.5) = 78 x = 35.59
Solved
Show answers
More tips
- H Health and Medicine Tick Traps: How to Remove Them Safely and Effectively...
- S Society and Politics Why are thugs called gopniks ? A fascinating journey through Russian subculture...
- A Animals and plants Want a Perfect Lawn? Learn How to Plant Grass the Right Way...
- A Animals and plants How to Properly Care for a Pet Decorative Rabbit at Home?...
- C Computers and Internet How to Check the Speed of My Internet?...
- H Health and Medicine 10 Ways to Cleanse Your Colon and Improve Your Health...
- W Work and Career How to Write a Resume That Catches the Employer s Attention?...
- C Computers and Internet Е-head: How it Simplifies Life for Users?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
Answers on questions: Mathematics
- M Mathematics On a math test Jason answered of the questions correctly, Paul answered of the questions correctly, Susie answered of the questions correctly, and Kate answered of the...
- M Mathematics Vitamin c is 3/4 cup of orange juice...
- M Mathematics Recall that a perfect square is a number of objects that can be arranged into a square. For example, 9 is a perfect square because 9 objects can be arranged into 3 rows...
- M Mathematics Y + 4 + 2x + 3y can someone simplify it...
- M Mathematics La Srta. Vázquez tiene 17 una clase de estudiantes. Ella puede gastar 24 dólares por estudiante para comprar material de matemáticas para el año escolar. Ella compra...
- M Mathematics Jenny is renting a moving truck. She will have to pay a one-time fee for insurance coverage and pay the daily rate for the truck each day she uses it. The total cost...
- M Mathematics During an 8-hour shift, Sophia can make 24 sweaters....
- M Mathematics A pitcher ok a baseball team is practicing his fast ball trying to ensure he hits the strike zone. He consistently releases the ball 3.4 feet high while he is pitching....
- M Mathematics (6x)^2 can be thought of as a vertical stretch by a factor of O 6 O 36 O nothing...
- M Mathematics Researchers interested in the relationship between miles run by cross country runners during the week and their performance on race day collected data from randomly selected...
Ответ:
c. 85(.60) + 87(.15) + 68(.10) + X(.15) = 78; X = 47.67
Step-by-step explanation:
The weighted average is the sum of products of score and weight. Choice C has the percentage weights properly expressed as decimal values.
___
The other equations could work if the final score of 78 were weighted by the corresponding equivalent of 100%. (X is wrong in the other choices as well.)
__
The attachment shows the "work". Given that choice C is the only correct equation, we presumed that the value of X was correct. The equation solver confirms this. If you want to do it by hand, compute the sum of products, subtract that sum, then divide by 0.15.
X = (78 -70.85)/.15 = 7.15/.15 = 47 2/3
Ответ:
18900 watt-hours
Step-by-step explanation:
3600 x 24 (hours in a day) = 150
150 x 6 (hours) = 900
3600 (watt hours per day) x 5 (days) = 18000
18000 x 900 = 18900
total= 18900