1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
liubo4ka [24]
3 years ago
7

There are 5 exams in a semester. You have scored 77, 90, 85, and 100 on the previous four exams. What must you make on the fifth

exam to get an average of exactly 86 for the marking period?
Mathematics
1 answer:
siniylev [52]3 years ago
5 0

Answer:

<h2>The correct answer for this question is 78.</h2>

Step-by-step explanation:

  • The average or mean of any variable or mathematical phenomenon is calculated as the division of the sum of all the numbers or items within the particular variable by the total number of items or numbers within the variable.
  • In this case, the marks of the 4 exams in the semester are 77,90,85 and 100 respectively.There are total 5 exams in the semester.
  • Let's suppose that the marks for the 5th exam is x.
  • Therefore, based on the mathematical formula to compute average or mean,to get an overall average of 86 including all the 5 exams, one has to get:-

   \frac{77+90+85+100+x}{5}=86

  77+90+85+100+x=430

  x=430-77-90-85-100

  x=78

  • Hence, based on the above calculations,one has has to get 78 on the 5th exam to obtain an overall average of exactly 86.

You might be interested in
In each of the following examples, a consumer purchases just two goods: x and y. Based on the information in each of the followi
SOVA2 [1]

The question is:

In each of the following examples, a consumer purchases just two goods: x and y. Based on the information in each of the following parts, sketch a plausible set of indifference curves (that is, draw at least two curves on a set of labeled axes, and indicate the direction of higher utility). Also, writedown a utility function u(x, y) consistent with your graph. Note that although all these preferences should be assumed to be complete and transitive (as required for utility representation), not all will be monotone.

(a) Jessica enjoys bagels x and coffee y, and consuming more of one makes consuming the other more enjoyable.

(b) Plamen loves mocha swirl ice cream x, but he hates mushrooms y.

(c) Jennifer likes Cheerios x, and neither likes nor dislikes Frosted Flakes y.

(d) Edward always buys three white tank tops x for every pair of jeans y.

(e) Nancy likes both peanut butter x and jelly y, and always gets the same additional satisfaction from an ounce of peanut butter as she does from two ounces of jelly.

Step-by-step explanation:

The utility functions consistent with the graphs are:

(a) u(x, y) = xy

(b) u(x, y) = x - y

(c) u(x, y) = x

(d) u(x, y) = min(x, 3y)

See attachments for the graphs.

8 0
3 years ago
If you have 20 square pieces of wood, describe all the different ways you could make a rectangle by placing them side by side
rjkz [21]
If there is a 20 square pieces of wood, I can make a rectangle by placing them side by side are by 24, by 12, by 8 and by 6. Thank you for posting your question I hope my answer helps.

8 0
3 years ago
Read 2 more answers
2. The sum of k and 10 is 48
Amiraneli [1.4K]

Answer:

k=38

Step-by-step explanation:

38+10=48

7 0
2 years ago
Can anyone help me with this question
ElenaW [278]

Answer:

finger it out

Step-by-step explanation:

5/6 % 1/2 you flip the 1 and 2 so it will look like 2/1 then you multiply the fractions together

5/6 % 2 you make the 2 a frustration like 1/2 then you multiply 5/6 and 1/2 together

7 0
3 years ago
A jar contains six red marbles 10 Green marbles and eight blue marbles. A marble was elected at random, The color was recorded,
maksim [4K]
Relative frequency = (number of times an item appears) /(TOTAL numbers)

Relative frequency (selecting Red ) = 13/30 =0.434
6 0
3 years ago
Other questions:
  • Evaluate C(5, 0).  Combinations
    8·1 answer
  • What is x if x squared minus 6x equals negative 25
    10·1 answer
  • aquí usando la división desarrollada escribe cada número racional como un número decimal finito periódico usa la notación de bar
    11·1 answer
  • The stopping distance d of an automobile is directly proportional to the square of its speed s. On one road, a car requires 75 f
    15·1 answer
  • Solve for x and y simultaneously:<br>(3x-9y)²+(x+15)²=0​
    11·1 answer
  • Express 148.502 in standard form<br>Pls as soon as possible<br><br>​
    14·2 answers
  • If f (n)= - 3n + 2, what is the value of f(12) ?
    11·2 answers
  • Which of the following is the equation of the x-axis?​
    7·2 answers
  • What number must you add to complete the square?
    15·1 answer
  • Why did the Europeans come to north america
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!