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vaieri [72.5K]
3 years ago
8

St 2

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
3 0

Answer:

$5.5

Step-by-step explanation:

6 * N (notebook) + 3 * P (pen) = 27

n = 1.5 +P

6 * (1.5 + P) + 3 * P = 27

9 +6p +3p = 27

9p = 18

p (pen): $2

N (notebook): $3.5

combined cost of 1 pen and 1 notebook: $2 + $ 3.5 = $ 5.5

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Why do you set the equations equal to each other?
Liono4ka [1.6K]

Answer:

you set them to equal each other so you are able to get all the variables in the same way since sometimes being on one side of the equal can make it positive but on the other side it would be negative

8 0
4 years ago
Find the solution of given expression<br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B100%20%5Ctimes%2016%7D%20" id="TexFo
enyata [817]

Answer:

\sqrt{100 \times 16}=\sqrt{10² \times 4²}=±(10×4)=±40 is your answer

5 0
3 years ago
Read 2 more answers
In one round robin chess tournament, 36 games were played. How many players entered in the tournament?
ICE Princess25 [194]
\displaystyle&#10;\binom{n}{2}=36\\\\&#10;\dfrac{n!}{2!(n-2)!}=36\\&#10;\dfrac{n(n-1)}{2}=36\\&#10;n(n-1)=72\\&#10;n^2-n-72=0\\&#10;n^2-9n+8n-72=0\\&#10;n(n-9)+8(n-9)=0\\&#10;(n+8)(n-9)=0\\&#10;n=-8 \vee n=9

The number of players can't be negative, so there was 9 players.


6 0
4 years ago
Please HELPPP !!!!!!!
Kaylis [27]
D, (a + b = c) hope this helps
3 0
4 years ago
Solve for x in the following linear equation a)17-4x=8-x<br>b)3x/4=9 c)5x+6)(x+2)=56​
AnnyKZ [126]

Answer:

a) 3

b) 12

c) 4

Step-by-step explanation:

a)

17 - 4x = 8 - x

9 = 3x

x = 3

b)

3x ÷ 4 = 9

3x = 36

x = 12

c)

5x + 6 × (x + 2) = 56

5x + 6x + 12 = 56

11x = 44

x = 4

5 0
3 years ago
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