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
Nookie1986 [14]
3 years ago
10

The mean of a,b,c,and d is 9 and the mean of a,b,c,d,e and f is 12. find the mean of e and f​

Mathematics
1 answer:
Simora [160]3 years ago
8 0

Answer:

mean of e + f = 18

Step-by-step explanation:

(a + b + c + d)/4 = 9         Multiply by 4

a + b + c + d = 9 * 4 = 36

(a + b + c + d + e + f ) / 6 = 12

but a + b + c + d = 36

(36 + e + f)/6 = 12             Multiply by 6

36 + e + f = 72                 Subtract 36 from both sides

e + f = 36                         Divide by 2 to find the mean.

(e + f)/2 = 36/2

mean of e + f = 18

You might be interested in
1) Ben has been 30 minutes late to work on each of the last 7 days. The number of hours that he has been late will be deducted f
IrinaVladis [17]
The to the question is 3.5 hours
5 0
2 years ago
Read 2 more answers
Please help quickly !!
anygoal [31]

Answer:

50

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Ricky spends $103. 19 in additional interest and charges on monthly payments as the result of a prior bankruptcy. If Ricky had b
erastova [34]

Answer:

C. 1,315.06

Step-by-step explanation:

................

5 0
2 years ago
Otto’s Autos buys a car for $12,000 and want to mark it up by 25%. How much will the new selling price be?
sp2606 [1]

Answer:

15000

Step-by-step explanation:

6 0
3 years ago
What are the solutions of the system?
miskamm [114]
We have the following system of equations:
 y = -6x-6
 y = x2-5x-6
 Matching we have:
 x2-5x-6 = -6x-6
 Rewriting we have:
 x2-5x-6 + 6x + 6 = 0
 x2 + x = 0
 Rewriting:
 x (x + 1) = 0
 The solutions are:
 x = 0
 x = -1
 For x = 0
 y = -6 (0) -6 = 0-6 = -6
 y = -6
 For x = -1
 y = -6 (-1) -6 = 6-6 = 0
 y = 0
 The solutions are:
 (x, y) = (0, -6)
 (x, y) = (- 1, 0)
 Answer:
 
The solutions of the system are:
 (-1, 0) and (0, -6)
3 0
3 years ago
Other questions:
  • 6x + 2 = 5x + 17, would there be one unique solution? What is it?
    5·2 answers
  • Slope is -2 and y-intercept is -6 how do I write the linear equation in slope intercept form
    12·1 answer
  • A $325 suit is marked down to $286. Find the percent of change. Explain please
    12·1 answer
  • D=5.32 to the nearest hundredth
    13·1 answer
  • 27-10/30
    7·1 answer
  • Academy sporting goods store sells two different models of a popular
    7·1 answer
  • LA cow's stomach produces about 20
    5·1 answer
  • Explain why a triangle can't have two right angles​
    5·1 answer
  • Question 6(Multiple Choice Worth 1 points)
    15·1 answer
  • I need the correct answer
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!