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Vladimir [108]
3 years ago
11

Need with Qu. 20 I don't know how to do it

Mathematics
2 answers:
Bess [88]3 years ago
6 0
9(7k-4)-2(7k-12) so first separate these two parts of it ok. 9(7k-4) the - and 2(7k-12) so first let’s do 9(7k-4) multiply 9*7 to get 63k and 9*4 to get 36. So now u have 63k-36. Let’s do the 9(7k-12) now. Same thing. 2^7=14 then 2*12 = 24 which leaves u at 108. So now if u put i together it’s (63k-36)-(14k-24) soooo 63k-14k= 49k and 36-24 = 12 so ur answer is 49k-12 !!! Hope that helps man
abruzzese [7]3 years ago
5 0

Answer:

The answer is either 3 or 15

Step-by-step explanation:

1.Multiply

2. combine like terms

3. Subtract 18k-14k

4. then which gives you 4

5. 4k-36-24

6.4k=12

7. k =3

the reason y I also say 15 is because if you go back over to step 5 and put add instead you would get 60.

it would look like this

4k - 36 + 24

+24 - 24

4k = 60

k = 15

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Answer:

c i believe

Step-by-step explanation:

brainliest?

3 0
3 years ago
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The scale drawing of a park uses the scale 5 cm= 1 km. what is the perimeter of the actual park?​
kobusy [5.1K]

Answer:5.0 × 10-5

Step-by-step explanation:

5 cm divided by 1 km

8 0
3 years ago
Solve.
baherus [9]
The correct answer is:  [C]:  " 5 " .
__________________________________________________________
                                →  " a = 5 " .
__________________________________________________________
Explanation:
__________________________________________________________ 

Given:  " a + 1 <span>− 2 = 4 " ; Solve for "a" ; 

4 + 2 = 6 ; 

6 </span>− 1 = 5 ;   →  a = 5 ;

To check our work:

5 + 1 − 2 = ? 4 ?? ;  

5 + 1 = 6 ; 

6 − 2 = 4.  Yes!

So the answer is:  [C]:  " 5 ". 
_________________________________________________________
                          →   " a = 5 " . 
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4 0
4 years ago
In a certain soccer tournament you play 6 games. In every match you get 3 points if you win, 1 point for a draw and 0 points if
Ann [662]

Answer:

0.430625 = 0.431

Step-by-step explanation:

Let W represent winning, D represent a draw and L represent a loss.

12+ points can be garnered in each of the following ways.

6W 0D 0L

5W 1D 0L

5W 0D 1L

4W 2D 0L

4W 1D 1L

4W 0D 2L

3W 3D 0L

The probability of getting 12+ points is the sum of all these 7 probabilities.

Knowing that P(W) = 0.5

P(D) = 0.1

P(L) = 0.4

P(6W 0D 0L) = [6!/(6!0!0!)] 0.5⁶ 0.1⁰ 0.4⁰ = 0.015625

P(5W 1D 0L) = [6!/(5!1!0!)] 0.5⁵ 0.1¹ 0.4⁰ = 0.01875

P(5W 0D 1L) = [6!/(5!0!1!)] 0.5⁵ 0.1⁰ 0.4¹ = 0.075

P(4W 2D 0L) = [6!/(4!2!0!)] 0.5⁴ 0.1² 0.4⁰ = 0.09375

P(4W 1D 1L) = [6!/(4!1!1!)] 0.5⁴ 0.1¹ 0.4¹ = 0.075

P(4W 0D 2L) = [6!/(4!0!2!)] 0.5⁴ 0.1⁰ 0.4² = 0.15

P(3W 3D 0L) = [6!/(3!3!0!)] 0.5³ 0.1³ 0.4⁰ = 0.0025

The probability of getting 12+ points = 0.015625 + 0.01875 + 0.075 + 0.09375 + 0.075 + 0.15 + 0.0025 = 0.430625

5 0
3 years ago
What does x equal if 6-4x=7x-9x-4
Licemer1 [7]

x= 5

Slove for x by simplifying both sides of the equation, then isolating the variable

6 0
3 years ago
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