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
d1i1m1o1n [39]
4 years ago
5

The mean of 7 numbers is 15. When an 8th number is added the mean decreases to 12. What is the 8th number?

Mathematics
1 answer:
ale4655 [162]4 years ago
3 0

Answer:

The 8th number is -9

Step-by-step explanation:

With an average, the sum of the seven numbers divided by 7 is 15.

In order to add an 8th number, we set up

\frac{7*15+x}{8}=12\\105 + x = 96\\x = -9\\\\\frac{105-9}{8}=\frac{96}{8}=12

You might be interested in
HELP ASAP!!! THE BEST ANSWER GETS BRAINLIST! (15 POINTS)
Veseljchak [2.6K]
Don’t click on the link please
6 0
3 years ago
Which two days will Jack work half of his salary if: Monday he gets $36 Tuesday he gets $60 Wednesday he gets $72 Thursday he ge
Mumz [18]

Answer:

it is Tuesday and can you answer my question in my profile PLEASE

5 0
3 years ago
Read 2 more answers
Which three of the following expenses can student aid cover? tuition television school supplies parties and socializing boarding
Hitman42 [59]

The tuition, school supplies, and boarding/housing for the expenses can student aid cover.

<h3>What is decision-making?</h3>

The process of making choice is by identifying the correct decision, gathering information, and assessing alternative solutions.

The following expenses can student aid cover.

A.  Tuition - A student aid cover can be utilized to promote the tuition.

B.  Television - There is no use of the student aid cover for selling the TV.

C.  School supplies - We can use the face of the topper on the school supplies to promote schooling.

D.  Parties and socializing - There is no need for student aid cover for parties and socializing.

E.  Boarding or housing - We can use student aid cover to promote the hostel for the student.

More about the decision-making link is given below.

brainly.com/question/3369578

5 0
2 years ago
-2x+3&lt;9 answer please
just olya [345]

Answer:

x > -3

Step-by-step explanation:

-2x < 9 - 3

-2x < 6

-x < 3

x > -3

3 0
3 years ago
Solve the system of linear equations using matrices.<br> x+6y=7<br> x + 5y=4
Rzqust [24]

Answer:

1+6y= "7y=7"

1+5y= "6y=4"

Step-by-step explanation:

X represents "1" so you replace your "X" with "1" and solve the equation.

3 0
3 years ago
Other questions:
  • Which of the following correctly uses absolute value to show the distance between -50 and 12? A: |-50 - 12| = |-62| = -62 units
    8·1 answer
  • 7.23 as a improper fraction
    10·1 answer
  • TWO MINUTES HELP MY PLEASE
    9·2 answers
  • Determine the range of the function.
    12·1 answer
  • Which logarithmic equation is equivalent to the exponential equation below? 70.81 = ea
    10·2 answers
  • I need help with 12 and 14
    13·1 answer
  • Lisa's penny bank is
    6·1 answer
  • Carrie recorded the temperature outside her school at the same time each day for four days. On Monday, the temperature was 11 de
    12·1 answer
  • Which one is it please help meee
    6·2 answers
  • EASY POINTS, PLEASE ANSWER ASAP, WILL MARK BRAINLIEST
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!