Ask question

Ask question

All categories

2 years ago

12

The mean of 14 numbers is 49. Removing one of the numbers causes the mean to decrease to 43. What number was removed?

1 answer:

Mademuasel [1]2 years ago

4 0

Answer:

126 was removed.

Step-by-step explanation:

The total before division took place was

Total = mean * 14

mean = 49

Total = 49 * 14

Total = 685

Now you subtract x from the total

685 - x

And divide by 13 [one number is missing]

(685 - x)/13

and the result = 43

(685 - x ) / 13 = 43 Multiply both sides by 13

685 - x = 43 * 13

685 - x = 559 Subtract 685 from both sides

- x = - 126 Multiply by - 1

x = 126

You might be interested in

HELLPP!!!!!!!!!!!!!!!!!!!!!!!!!

Genrish500 [490]

$\left\{\begin{array}{ccc}2x-3y=-27&|\cdot3\\-3x+2y=23&|\cdot2\end{array}\right\\\underline{\left\{\begin{array}{ccc}6x-9y=-81\\-6x+4y=46\end{array}\right}\ \ \ \ |\text{add both sides}\\.\ \ \ \ \ \ -5y=-35\ \ \ \ \ |:(-5)\\.\ \ \ \ \ \ \ \ y=7\\\\\text{put the value of y to the first equation}\\\\2x-3(7)=-27\\\\2x-21=-27\ \ \ \ |+21\\\\2x=-6\ \ \ \ |:2\\\\x=-3\\\\\text{Answer:}\ x=-3,\ y=7\to\boxed{(-3,\ 7)}$

6 0

3 years ago

Please help i will give brainliest!!

valina [46]

Answer:

1225miles

$\frac{(1225)}{(1.578) \times {(10}^{ - 5} )}$

8 0

3 years ago

The intensity, I, of a sound varies inversely with the square of the distance, r, from the source of the sound. Write an equatio

charle [14.2K]

Answer:The equation relating I, r, and k is I =K/r²

Step-by-step explanation:

The intensity, I, of a sound varies inversely with the square of the distance, r, from the source of the sound can be written as

I ∝ 1/r²

Introducing the constant of proportionality, K we have that

I =K x 1/r²

Therefore , the equation relating I, r, and k is I =K/r²

7 0

2 years ago

Whats 12 x 4? Thank you for answering!

dedylja [7]

So, we have the following equation...

$12*4=?$

To do this its pretty simple just multiply 12 by 4.

$12*4=48$ .

Your final answer is $48$ !

I only need 3 more brainliests so if i could get one that would be a big help!

3 0

3 years ago

The length of a rectangle is given by L=3y + 4x while the width is

Wittaler [7]

Answer:

21y² +34 yx + 8x²

Step-by-step explanation:

Area of a rectangle is given by L×W where L is length, and W is width

Given L=3y+4x

W=7y+2x

Area= (3y+4x) × (7y+2x)

3y(7y+2x) + 4x(7y+2x)

21y² + 6yx +28yx+8x²

21y² +34 yx + 8x²

3 0

2 years ago