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2 years ago

The average of 6 members to 2 8 9 x 7 and 12 is 7 find the value of x

Mathematics

1 answer:

Bond [772]2 years ago

4 0

Answer:

x=(-45)

Step-by-step explanation:

2+8+9+x+7+12=7

38+x=7

x=(-45)

38+(-45)=7

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There are 10 history books in a bookcase. When

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Answer:

D) 140

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2 years ago

If 15 workers did a job is 8 hours, how long would it take 5 workers to do half of this job?

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3 years ago

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3 years ago

V+8w=4v,for v -m+5n=-2, for n

jok3333 [9.3K]

Answer:

v = 8w/3,
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---------------------------

<h3>Given equations</h3>

v + 8w = 4v and - m + 5n = - 2

<h3>Solve the first equation for v</h3>

v + 8w = 4v
4v - v = 8w
3v = 8w
v = 8w/3

<h3>Solve the second equation for n</h3>

- m + 5n = - 2
5n = m - 2
n = (m - 2)/5

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1 year ago

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Each floor of a doll house is 12.5 inches tall. If the height of the doll house is 75 inches, how many floors does the doll hous

larisa86 [58]

<h2>Answer :</h2>

$\bigstar\boxed{\large\bf{\leadsto 6\:floors}}$

⠀⠀━━━━━━━━━━━━━━━━━━━━━━━━━━━━⠀⠀

$\begin{gathered}\rm{ \underline{ \underline{ \red{Given}}}}\begin{cases}\sf{height\:of\:one\:floor\:of\:dollhouse =12.4\:in} & \\ \\\sf{Height\:of\: dollhouse=75\:in}&\end{cases}\\\\\end{gathered}$

Total number of Floors in dool house

➜ Therefore , Total number of floors can be find out by dividing the total height of dollhouse by the length of one floor

‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎ $\bf{=\cancel{ \dfrac{75}{12.5}}}$

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎

‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎ $\bf{= 6}$

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎

⠀⠀━━━━━━━━━━━━━━━━━━━━━━━━━━━━⠀⠀

8 0

2 years ago

The average of 6 members to 2 8 9 x 7 and 12 is 7 find the value of x​

The average of 6 members to 2 8 9 x 7 and 12 is 7 find the value of x