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
tatiyna
3 years ago
13

You are studying for your final exam of the semester. up to this point,you recieved 3 exam scores of 76%,99%, and 86%. to reciev

e a grade of A in the class you must average exam score between 90% and 100% for all 4 exams including the final.
Find the widest range of scores that you can get on the final exam in order to recieve a grade of A for the class.Use interval notation
Mathematics
2 answers:
Levart [38]3 years ago
4 0
What you have to do is add up the amount of total grade scores. 76+99+86+x. You get 261+x. you have to get 99% or higher

anygoal [31]3 years ago
4 0

Answer: The required range of marks is,

[99 100]

Step-by-step explanation:

Let x be the percentage score on the final exam,

Since, 3 exam scores are 76%, 99%, and 86%,

Thus,

\text{The total average percentage scores in four exams}= \frac{\text{Total sum of four exams percentage}}{4}

=\frac{ 76+99+86+x}{4}

According to the question,

For getting grade A,

90 ≤ The total average percentage scores in four exams ≤ 100

90\leq \frac{ 76+99+86+x}{4}\leq 100

360 \leq 261 + x\leq 400

360 - 261 \leq x\leq 400 -261

99\leq x\leq 129

But x can not exceed to 100 %,

\implies 99\leq x\leq 100

Thus, the required range of marks in fourth exams for getting grade A is,

[99 100]

You might be interested in
Determine the intercepts of the line.<br> 4x – 1= 3y + 5<br> x-intercept:(_,_)<br> y-intercept:(_,_)
BARSIC [14]

Answer:

X-intercept: (1.5,0)

y-intercept: (0,-2)

the 1.5 can also be written as 3 over 2 in fraction form.

Hope this helps! :)

4 0
3 years ago
A cable is 84 meters long, it is cut into two pieces so that one piece is 18 meters longer than the other. Find the length of ea
weeeeeb [17]

Long Piece: x + 18

Short Piece: x

(x) + (x + 18) = 84

2x + 18 = 84

2x = 66

x = 33

Long Piece: x + 18  = (33) + 18   = 51

Answer: 33 meters and 51 meters

5 0
3 years ago
Find the perimeter of the polygon. 14 ft, 15 ft, 7 ft, and 11 ft.
Sophie [7]
You just have to add the numbers up.
So the perimeter is 47 ft.
8 0
3 years ago
Read 2 more answers
Can someone help me how to calculate a square root of 8​
horrorfan [7]

Answer:

2.82842712475

Step-by-step explanation:

when you square 2.82842712475 your answer is 8 so the number above Is answer

7 0
3 years ago
Read 2 more answers
A bag contains 8 blue marbles, 15 red marbles, 10 yellow marbles, and 3 brown marbles. If a marble is randomly selected, what is
Lina20 [59]

Answer:

3/36 or 1/12

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Cody wants to attend the fall festival at school.
    14·1 answer
  • Jared surfed for 1/3 of the 9 hours he was at the beach. he spent the rest of the time building a castle. how many hours did he
    11·1 answer
  • X/4+5=x/3+10<br><br> Solve and check.
    10·2 answers
  • The number 5336 contains a set of digits and which one digit is ten times as great as the other
    7·2 answers
  • A circular rug has a diameter of 6 feet. What is the area of the rug?
    8·1 answer
  • A student examines a picture of an important biological molecule in a textbook and writes four statements about the molecule in
    14·1 answer
  • Find the slope of the line that goes through the given points.<br> (-9, -7) and (-7,9)
    10·2 answers
  • One student begins in Cleveland, Ohio, and walks towards Buffalo, New York, a distance of 200 miles. She walks at the rate of 2.
    8·1 answer
  • I just need to know if i did this correct ! thank you
    10·1 answer
  • Which list orders the numbers from least to greatest?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!