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
Zielflug [23.3K]
3 years ago
13

To get an A in a course, you must have an average of at least 90% on four tests worth 100 points each. Your scores so far are 85

, 94, and 84. What must you score on the fourth test to get an A in the course?
Mathematics
1 answer:
kondaur [170]3 years ago
6 0

Answer:

A score of 117 is needed, which Is not possible since the test is over 100.

Step-by-step explanation:

The other 3 scores are 85, 94,84 . Let's x be the 4th score he must score.

Therefore ( 85 + 94 + 84 + X)/4 =95

Then 263+X /4 =95

Cross mutiplying 4*95=263+X

Therefore X= 380-263

X= 117 which is not possible since the test score is over 100.

You might be interested in
The sum of five times a number and 6 is 21. What is the number?
Nataliya [291]

Answer: it’s 3

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
There are three exams in your linear algebra class, and you theorize that your score in each exam (out of 100) will be numerical
Romashka [77]

Answer:

a) 40 hours

b) 60 hours

C) 100 hours

Step-by-step explanation:

0.2a + 0.3b+0.5c = 76

Hence: 0.2* (0.2 λ) +0.3*(0.3 λ )+0.5*(0.5 λ ) = 76

0.38 λ =76

λ = 76/0.38 =200

Thus : 40, 60, 100

7 0
3 years ago
What is the value of y in the equation 5x + 2y = 20, when x = 0. 3 A) 2.5 B) 2.8 C) 9.25 D) 10.75
NemiM [27]
// Plug x into the equation

5(0.3)+2y=20
1.5+2y=20

// Subtract 1.5 from each side

2y=18.5

//Divide each side by 2

y=9.25 (C)
5 0
3 years ago
What is the sum of the polynomials?<br> (7x^3– 4x^2) + (2x^3 +3x)
DaniilM [7]

Answer:

sum of the polynomials is 9 x^{3} - 4 x^{2} +3x

Step-by-step explanation:

Given polynomial is (7 x^3– 4 x^2) + (2 x^3 +3 x)

adding x^3 terms, now we get

(7+2)x^3-4 x^2+3 x

9 x^{3} - 4 x^2 +3 x

Therefore the sum of given polynomial is

9 x^3-4 x^2+3 x

5 0
3 years ago
Write an algebraic expression for the word expression.
max2010maxim [7]
1.  x+9
2. (b-5)+6
3. 15+5v
4. 2/3k
6 0
3 years ago
Read 2 more answers
Other questions:
  • The sum of 12 and twice a number
    10·2 answers
  • What is the answers ?
    15·2 answers
  • Use a definite integral to find an expression that represents the area of the region between the given curve and the x-axis on t
    13·1 answer
  • Ahmed lent amir Rs8000 at simple interest for 3 years at the rate of 5% per annum. How much more would he have gained if he had
    13·1 answer
  • How would i rewrite this equation so it is not in fraction form<br><br><br>-5/(1-cos(-x))
    5·1 answer
  • Write the word as an equation. then solve.<br>the product of 15 and a number x is -75
    6·1 answer
  • 3. Consider the figure below, What is the sum of m
    10·2 answers
  • Given the parent functions f(x) = 3x + 2 and g(x) = 5x − 10, what is g(x) − f(x)?
    15·1 answer
  • Juan had $8.34 He then bought a notebook for $4.16.<br> How much money does he have left?
    11·1 answer
  • Express each of the following fractions as a percentage 9 by 27 ​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!