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
Airida [17]
3 years ago
8

Linh has obtained scores of 82, 79, and 75 on her midterm algebra exams. If the final exam counts twice as much as a midterm, wh

at score must she make on her final exam to get an average score of 80? (Assume that the maximum possible score on each test is 100.)
Mathematics
1 answer:
OLga [1]3 years ago
8 0

Answer:

She must make a score of 42 in the final exam to obtain an average of 80.

Step-by-step explanation:

Hi there!

Let x be the score of the final exam, the equation will be as follows (remember that the score of the final counts double):

(82 + 79 + 75 + 2x)/4 = 80

Let´s solve the equation for x multiplying each side of the equation be 4:

82 + 79 +75 + 2x = 320

Substract 82, 79 and 75 to both sides of the equation:

2x = 320 - 82 - 79 -75

2x = 84

x = 84/2

x = 42

She must make a score of 42 in the final exam to obtain an average of 80.

Have a nice day!

You might be interested in
Mrs. Sing invests $12,876 for her business at an annual interest rate of 7 percent for 3 years. Which number will Mrs. Sing subs
xeze [42]

Answer:

she wills substitute r with 7%.

Step-by-step explanation:

Just did it.

8 1
3 years ago
Read 2 more answers
Enter the exact product of 5.21 •7.3.
frez [133]

Answer:

3.033

Step-by-step explanation:

5.21*7.3=3.003

6 0
2 years ago
Read 2 more answers
Solve for x in a triangle. Round your answer to the nearest hundredth
Molodets [167]
16cos(28). Type that in like last time.
8 0
2 years ago
NEED HELP THIS IS SOOOOOO HARD NEED PROOF <br> WILL GIVE BRAINLIEST AND 5-STAR
Shkiper50 [21]

Answer:

J    1

   --------

    x^2 -x

Step-by-step explanation:

x+1

----------

x^3-x

Factor out an x in the denominator

x+1

----------

x(x^2-1)

We can factor the terms in the parentheses because it is a difference of squares

x+1

----------

x(x-1) (x+1)

Canceling the x+1 terms

1

----------

x(x-1)

Distribute in the denominator

1

--------

x^2 -x

7 0
2 years ago
Which of the following can you determine, when you use deduction and start from a given set of rules and conditions? O A. What m
snow_tiger [21]

Answer:

Its C it must be true

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • What is 1.35 divided by 5
    10·1 answer
  • What is the answer of -2h -7 and h is -1
    7·2 answers
  • 3. What can you use to measure area? Include examples please
    7·1 answer
  • Find the circumference of these circles
    11·1 answer
  • A seamstress used 4 meters of ribbon to make 20 bows. She used __ of a meter for each bow.
    11·1 answer
  • What is the slope of y= -1/2x - 5?​
    12·2 answers
  • If 35% of the students attended the ceremony. What fraction of the students attended the ceremony? Help, please!
    10·1 answer
  • A regular polygon has
    14·2 answers
  • The table shows the results of randomly selecting colored marbles from a bag 40 times. The marble was returned to the bag after
    7·1 answer
  • Solve for x 25x+5 10x
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!