Grades in three tests in College Algebra are 87,59 and 73. The final carries double weight. The average after final is 75 The points needed on the final to average the points to 75 when the final carries double weight.

Falak Kinney 2021-02-21 Answered
Grades in three tests in College Algebra are 87,59 and 73.
The final carries double weight.
The average after final is 75
The points needed on the final to average the points to 75 when the final carries double weight.
You can still ask an expert for help

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

Solve your problem for the price of one coffee

  • Available 24/7
  • Math expert for every subject
  • Pay only if we can solve it
Ask Question

Expert Answer

Tuthornt
Answered 2021-02-22 Author has 107 answers
Calculation:
Let the grade in the final test be x
Average of n numbers a1+a2+a3+...an is given by A=a1+a2+a3+...+ann
Since the final carries double weight, it is considered as 2 numbers and the score is doubled,
i.e.,
A=87+59+73+2x5
Given average is 75
Therefore,
75=87+59+73+2x5
Multiplying both sides by 5
755=87+59+73+2x55
375=219+2x Subtracting 219 from both the sides,
375219=219+2x219
156=2x
2x=156
Dividing both sides by 2,
2x2=1562
x=78
Therefore the score required in final test to get an average of 75 with double weight for final test is 78.
Not exactly what you’re looking for?
Ask My Question

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

You might be interested in

asked 2021-05-11
h is related to one of the parent functions described in this chapter. Describe the sequence of transformations from f to h. h(x) = 5⟦x - 9⟧
asked 2021-09-29

f(x)=9,ifx4,andf(x)=ax+b,if4<x<5,andf(x)=9,ifx5,
Find the constants, if the function is continuous on the entire line.

asked 2021-06-25
An observational study is retrospective if it considers only existing data. It is prospective if the study design calls for data to be collected as time goes on. Tell which of the following observational studies are retrospective and which are prospective. To see whether crime mes are related to moon phase, a researcher looks at ten years of archived police blotter reports and compares them with moon charts from the same period.
asked 2021-01-19

The fixed costs where cost function is C(x)=42.5x+80,00

asked 2021-02-13
Find the x-and y-intercepts of this equation.
h(x)=3x5
asked 2020-12-15
Twenty-six students in a college algebra class took a final exam on which the passing score was 70. The mean score of those who passed was 78, and the mean score of those who failed was 26. The mean of all scores was 72.
How many students failed the exam?
asked 2022-06-13
Is there a genuinely respectable published expository account of what power series are used for, of which a substantial portion would be comprehensible to those first learning of power series in a first-year calculus course?
(I think it's a flaw in the way mathematics is conventionally taught that one first learns answers to questions like this only by taking a later course for which the one introducing the concept is a prerequisite, and one has no prior notice of which course that might be. And in the case of power series, there are many such courses, but still very few compared to the number of courses a student might later take, so the situation is worse.)

New questions