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skelet666 [1.2K]
3 years ago
15

A music store marks up the instruments it sells by 30%.

Mathematics
1 answer:
lesya692 [45]3 years ago
4 0

Answer:

B is always right

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Consider all numbers consisting of four different digits all between 1 and 9 . How many of these are odd
Slav-nsk [51]

Answer:

1680

Step-by-step explanation:

Considering repeatition is not allowed.

We can  use permutation to reach to the required answer.

Consider four digits to be placed in four boxes. Now for the number to be odd, unit digit must be odd. Therefore, unit digit can only be filled by 1, 3, 5,7, or 9. That is 5 ways. Now, other three boxes can be filled with 8, 7 and 6 ways respectively.

Therefore, Total numbers = 5×8×7×6 = 1680

7 0
3 years ago
Please tell me the answer
const2013 [10]

Answer:

it is C

Step-by-step explanation:

6 0
3 years ago
A pitcher holds 3/4 gallons of kool-aid. Martin wants to pour equal amounts of kool- aid into 6 smaller cotainers. How much kool
statuscvo [17]

Answer:

\dfrac{1}{8}\ gallons

Step-by-step explanation:

Amount of kool - aid that the pitcher can hold = \frac{3}4 gallons

There are 6 smaller containers in which this kool - aid is to be adjusted.

Also, the volume of the smaller containers is equal to each other i.e. the containers are identical to each other in terms of volume.

To find:

The amount of kool - aid that each container can hold?

Solution:

Volume of all the smaller containers combined = Volume of the kool - aid available

Let the volume of one smaller container = V

V + V + V + V + V + V = \dfrac{3}{4}\ gallons

\Rightarrow 6V = \dfrac{3}{4}\ gallons\\\Rightarrow V = \dfrac{3}{4\times 6 }\ gallons\\\Rightarrow V=\bold{\dfrac{1}{8}\ gallons}

\frac{1}{8}\ gallons of kool - aid is the amount that each smaller can hold.

8 0
3 years ago
A farmer is purchasing cotton seed to plant in his field. If he purchases 400 pounds of seed at $700, what is the cost (k) for o
hichkok12 [17]

hi

700 for 400.  , then.  700 /400 = 7/4 = 1.75

4 0
3 years ago
Read 2 more answers
When 3 times a number is decreased by 9, the result is 27. What is the number?
son4ous [18]
3x-9=27
+9 +9
3x=36
/3 /3
x=12
4 0
3 years ago
Read 2 more answers
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