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
gayaneshka [121]
3 years ago
11

the mean height of the 30 children in a room is 76 cm james whose height is 107 cm went into the room what is the new mean of th

e height of the children in the room?​
Mathematics
1 answer:
Snezhnost [94]3 years ago
4 0

Answer:

The new mean is 77cm

Step-by-step explanation:

If the mean height of the 30 children in a room is 76 cm, then the sum of their ages is

30 \times 76 = 2280cm

If James with height 107cm joins them, then the total number of children now becomes 30+1=31 and the total height becomes: 2280cm+107cm=2387cm

The new mean now becomes:

\bar x =  \frac{2387}{31}  = 77cm

You might be interested in
Find fg(x) <br><img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20%20%7Bx%7D%5E%7B2%7D%20%20%2B%202" id="TexFormula1" title="f(x
Kipish [7]

Answer:

f(g(x)) = x^4 + 12x^3 + 14x^2 -132x + 123

Step-by-step explanation:

Here, we simply will place g(x) into f(x)

So every x in f(x) is replaced by g(x)

Thus, we have;

(x^2 + 6x + 11)^2 + 2

= (x^2+6x-11)(x^2 + 6x -11) + 2

= x^4 + 6x^3 -11x^2 + 6x^3 + 36x^2 - 66x -11x^2 -66x + 121 + 2

= x^4 + 12x^3 + 14x^2 -132x + 123

7 0
3 years ago
1+3x=x+9 solve for x.. Help?
anzhelika [568]

Answer: <em>x=4</em>

Step-by-step explanation:

<em>1+3x=x+9</em>

<em>   -x  -x</em>

<em>1+2x=9</em>

<em>-1      -1</em>

<em>2x=8</em>

<em>Divide by 2 on each side</em>

<em>Final result</em>

<em>x=4</em>

7 0
3 years ago
9. Solve the equation. Check your solution, if possible.<br> 1.5x + 1.3x = -8.4
Maksim231197 [3]

Answer:

-3

Step-by-step explanation:

1.5x + 1.3x = -8.4

2.8x = -8.4

x=-3

6 0
3 years ago
Read 2 more answers
Solve for x: 2(3x +1)-4=6 ​
puteri [66]

Answer:

4/3 or 1.3333333...

Step-by-step explanation:

2 x (3x + 1)-4 = 6.

6x+2-4=6.

6x+2=10

6x=8.

X= 1.3333333... OR 4/3

5 0
3 years ago
Read 2 more answers
Find CE in the length indicated
nikdorinn [45]

Okay, to find length CE, your going to know the value of x. Length BC + CE = BD + DE.3x+47+x+26=27+x+10Simplify the equation to get4x+73=37+xyou can choose one of four ways to continue, but I will choose to subtract x3x+73=37Subtract 73 from both sides of the equal sign3x=-36divide by 3 on both sides of the equal sign to get the value of xx=-12Now, plug in -12 for x in length CE to get -12+26=14


5 0
3 years ago
Other questions:
  • Y=x^3-4x^2+7 describe the end behavior of the polynomial
    15·1 answer
  • The larger of two numbers is 7 times the smaller number. 3 times the larger number is 7 more than 4 times the smaller number. Fi
    11·1 answer
  • Your discount brokerage firm charges $8.95 per stock trade. How much money do you need to buy 210 shares of Pfizer, Inc. (PFE),
    12·1 answer
  • An equation is shown below: 3 e - 8 ) = 5 e + 43 Solve this equation showing at least 4 steps and explain each step.
    13·2 answers
  • A town had about 2120 acres of pine trees 40 years ago only about 13% of the Pine trees remain how many acres of pine trees rema
    11·2 answers
  • Find the sum.<br> 2.680<br> 34.200<br> +20.386
    9·2 answers
  • 2.5 = x/2. What is x? (x/2 is a fraction)
    7·1 answer
  • Students at a basketball camp each attempted 5 free throws. The camp instructor recorded the number of free throws that each stu
    10·1 answer
  • Score: 0 of 1 pt
    12·1 answer
  • What is the solution to this equation? −5(p−30)=−10 pls help asap
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!