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
qwelly [4]
3 years ago
14

The mean score on a set of 17 test is 72. Suppose two more students take the test and score 68 and 63. What is the new mean?

Mathematics
1 answer:
Masja [62]3 years ago
8 0

Answer:

New mean=71.32

Step-by-step explanation:

The expression for the total initial score is;

T=M×S

where;

T=total initial score

M=mean score

S=number in the set

replacing;

T=unknown

M=72

S=17

replacing;

T=72×17=1,224

The total initial score=1,224

Determine the total score by;

total score=total initial score+total final score

where;

total initial score=1,224

total final score=(68+63)=131

replacing;

total score=1,224+131=1,355

Determine the new mean;

New mean=total score/new number

where;

total score=1,355

new number=(17+2)=19

replacing;

new mean=1,355/19=71.32

You might be interested in
Evaluate:<br> . C=4x? rind the value of c- given thatx = 16<br> pour
Butoxors [25]

Answer:

c=4x

c-4(16)

c=64

Step-by-step explanation:

6 0
3 years ago
Find the length of the segment AB.
ad-work [718]

Answer:

8.6

Step-by-step explanation:

You need to use the Patagorean theorem! :) Just do seven squared and five squared add them up and then square root them!!

3 0
1 year ago
Read 2 more answers
HELP PLEASE!!! BRAINLIESTTTTTTTTTTTTT
PilotLPTM [1.2K]
<span>1. What are the steps of the statistical process and how are they used in the real world?
     A.State
     B.Formulate
     C.Solve
     D.Conclude
</span> 2. What is the difference between categorical and quantitive data?Quantitative variables are numerical numbers like percents or counts
Categorical<span> variables are descriptions of groups or things like what kind of animal you are,The color of something etc..
</span>
Hope it helps ^^

<span>

</span>
3 0
3 years ago
Read 2 more answers
It’s late work and I’ve forgotten how to do it
Veseljchak [2.6K]
You want to eliminate one of the terms (x or y) in one of the equations so you can solve for the other variable.  You have to multiply by the opposite number of the coefficient to be able to eliminate the term in the other equation.  If the x coefficient is 2, then you have to multiply the entire other equation by -2.  If the y coefficient is -5, then you have to multiply the entire other equation by 5.


10)
-4x + 9y= 9
x - 3y= -6

STEP 1:
multiply the bottom equation by 4
4(x- 3y)= 4(-6)
4x - 12y= -24

STEP 2:
add the top equation and the equation from step 2

-4x + 9y= 9
4x - 12y= -24
the x term cancels out

-3y= 15
divide both sides by -3

y= -5

STEP 2:
substitute the y value in either original equation to solve for x

x - 3y= -6
x - 3(-5)= -6

x + 15= -6
subtract 15 from both sides

x= -21

ANSWER: x= -21; y= -5
____________________

12)
-7x + y= -19
-2x + 3y= -19

STEP 1:
multiply the top equation by -3 to eliminate the y term and to solve for x

-3(-7x + y)= -3(-19)
21x - 3y= 57

STEP 2:
add the bottom equation and the equation from step 2 to solve for x

-2x + 3y= -19
21x - 3y= 57
the y term cancels out

19x= 38
divide both sides by 19

x= 2

STEP 3:
substitute the x value in step 2 to solve for y; you can use either original equation

-7x + y= -19
-7(2) + y= -19

-14 + y= -19
add 14 to both sides

y= -5

ANSWER: x= 2; y=-5

Hope this helps!  :)

4 0
3 years ago
PLEASE HELP ME!!!! PLEASE
Ann [662]
D your welcome man:)
3 0
3 years ago
Read 2 more answers
Other questions:
  • Rewrite the expression with the given base.<br><br> 125^2x with a base of 5
    5·1 answer
  • I NEED HELP................................................... BRAINLIEST?
    12·1 answer
  • 28 -4t = 3t is it 4 the answer
    13·2 answers
  • You have sold your home and would like to travel the European country side. While you are out of the country, you would like the
    15·2 answers
  • 1 yard is equal to 3 feet (conversion factor). How many feet are in a football field (100 yards)?
    15·2 answers
  • Need answer asap!!! pls help ?
    6·2 answers
  • Help what is 4(3q+10)=6(2q-9)
    13·2 answers
  • Consider the points A(-2,-1), B(4,-1), C(3,0), and D(3,5). Are segment AB and CD<br> congruent?
    5·1 answer
  • What is the 185th digit of the following pattern 12345678910111213141516
    5·1 answer
  • Pls help this is homework
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!