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klio [65]
4 years ago
11

The average of 8 and what number = 3

Mathematics
2 answers:
Kazeer [188]4 years ago
8 0

Answer:

The number is -2

Step-by-step explanation:

The average of 8 and x

(8+x)/2

is 3

(8+x)/2 =3

Multiply each side by 2

(8+x)/2 *2 =3*2

8+x = 6

Subtract 8 from each side

8+x-8 = 6-8

x = -2

Leviafan [203]4 years ago
5 0

Answer:

-2

Step-by-step explanation

8+x/2=3

2(8+x/2)=3(2)

8+x=6

8-8+x=6-8

x=-2

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100 is deposited into an investment account on January 1, 1998. You are given the following information on investment activity t
klio [65]

Answer:

y = - 0.681 % ≈ -0.7 %

Step-by-step explanation:

Given:

                                                               April 19,1998            October 30, 1998

Value immediately prior to deposit                95                               105

                     Deposit                                       2X                                 X

amount in the account on January 1, 1999 = 115

effective dollar weighted yield = 0%

annual effective time weighted yield = y

To find:

Calculate y

Solution:

Given that the dollar weighted return is 0%

100 is deposited into investment account on January 1, 1998. So, add 100 to the deposits 2X X

100 + 2x + x = 115

3x = 115 - 100

3x = 15

x = 15/3

x = 5

Compute y

1 + y = (95/100)(105/105)(115/110)

1 + y = 0.95 * 1 * 1.045

1 + y = 0.99318

y = 0.99318 - 1

y = - 0.0068 * 100

y = - 0.681 % ≈ -0.7 %

y = -0.7 %

8 0
3 years ago
14% of 82 is what number
SVETLANKA909090 [29]
14% of 82
14/100 = 0.14
0.14 * 82 = 11.48

Answer: 11.48
7 0
4 years ago
Read 2 more answers
B is the midpoint of AC and E' is the midpoint of BD. If A(-9,-4), C(-1, 6), and E(-4,-3), find the coordinates of D.
Ipatiy [6.2K]
The coordinates for D are (-4, -7)

First we must locate point B as it is vital to finding the midpoint of BD. To do this, we take the average of the endpoints AC since B is its midpoint. 

x values = -9 + 1 = -8
Then divide by 2 for the average -8/2 = -4

y values = -4 + 6 = 2
Then divide by 2 for the average 2/2 = 1

Therefore B must be (-4, 1)

Now we know the values of E must be the average of B and D. So we can write equations for each coordinate since we know they are averages. 

x - values = (Bx + Dx)/2 = Ex
(-4 + Dx)/2 = -4 ---> multiply both sides by 2
-4 + Dx = -8 ---> add -4 to both sides
Dx = -4

y - values = (By + Dy)/2 = Ey
(1 + Dy)/2 = -3 ---> multiply both sides by 2
1 + Dy = -6 ---> subtract 1 from both side
Dy = -7

So the coordinates for D must be (-4, -7)
5 0
3 years ago
Read 2 more answers
The formula A=P(1+r)t is used to show the total amount owed for a loan with a simple annual interest rate.
vodka [1.7K]
We are asked to express r in terms of A, P, and t.

We first divide both sides of the equation by t, which gives us

                                         
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then, dividing both sides by P, we have

                     \displaystyle{ \frac{A}{Pt}=1+r.

Swap the sides:

                    \displaystyle{ 1+r= \frac{A}{Pt} 
      
Finally subtracting 1 from both sides gives us

                     \displaystyle{ r=\frac{A}{Pt}-1.


5 0
3 years ago
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Put the integers in order from least to greatest -3, -7, -11, 5, 0, -1, 8
Verizon [17]

Answer:

-11, -7, -3, -1, 0, 5, 8

Step-by-step explanation:

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3 years ago
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