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ElenaW [278]
3 years ago
8

1.3n-0.03=-9 (solve for n) grade lvl. 7

Mathematics
1 answer:
bazaltina [42]3 years ago
4 0

Hello from MrBillDoesMath!

Answer:

-6.9


Discussion:  

1.3n - 0.03 = -9     =>              multiply both sides by 100

130n - 3 = -900 =>

130n = -900 +3 =  -897 =>     add 3 to both sides

n = -897/130  =>

n =  - (69 * 13)/ (10*13) =>

n = - 69/10 = - 6.9




Thank you,

MrB

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Length of a rectangle is four times its width. If the perimeter is 100 m, what is the area in square cm?
melisa1 [442]

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6 0
3 years ago
Anna and kim shared 49 jellybeans in the ratio 3:4.Howw many jellybeans did kim receive​
lina2011 [118]
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3 years ago
-1.023 + 5.6 (show how you got the answer)
Rom4ik [11]

Answer:

-1.023 + 5.6 = 4.58

Step-by-step explanation:

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2. Add 0 at the end of 5.6, becoming 5.60

3. Here is the problem you now solve:

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4 0
2 years ago
Read 2 more answers
And, S2
dangina [55]

<u>Correct Question</u>

In the table shown, the sum of each row is shown to the right of the row and the sum of each column is shown below the column. What is the value of L?

\left|\begin{array}{c|c|c|c}-&-&-&-\\J&K&J&5\\K&K&L&13\\L&J&L&15\\-&-&-&-\\11&7&15\end{array}\right

Answer:

L=7

Step-by-step explanation:

From the first row: 2J+K=5

Therefore: K=5-2J

From the second column, 2K+J=7

Substitute K derived above into 2K+J=7

2K+J=7

2(5-2J)+J=7

10-4J+J=7

-3J=7-10

-3J=-3

J=1

Recall: K=5-2J

K=5-2(1)=3

K=3

From the third column, J+2L=15

1+2L=15

2L=15-1=14

L=7

Therefore, the value of L=7

CHECK:

\left|\begin{array}{c|c|c|c}-&-&-&-\\1&3&1&5\\3&3&7&13\\7&1&7&15\\-&-&-&-\\11&7&15\end{array}\right

4 0
3 years ago
2/3n + 5 greater than 12
Tanzania [10]
2/3n + 5 > 12
2/3n > 12 - 5
2/3n > 7
n > 7 * 3/2
n > 21/2 or 10 1/2
6 0
2 years ago
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