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Tom [10]
3 years ago
11

What is the value of n when 7n – 18 = 5n + 6?

Mathematics
2 answers:
forsale [732]3 years ago
4 0

Answer:

n=13

Step-by-step explanation:

7n-18=5n+6   move variables to 1 side

-5           -5    (in this case subtract 5 on both sides of the equal sign)

2n-18=  6        now you want to get the variable alone

   +18   +18     (in this case add 18 on both sides of the equal sign)

2n=26             now you want to get the variable (N) by itself

/2    /2            ( so divide 2 on both sides of the equal sign )

n=13  

kirill [66]3 years ago
3 0

Answer:

n=12

Step-by-step explanation:

7n-18 =5n+6

+18 to both sides

7n=5n+24

-5n from both sides

2n=24

divide by 2

n=12

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Which is greater 2/3 or 5/6
marysya [2.9K]
5/6 is greater.
2/3 < 5/6
6 0
3 years ago
The amount c in grams of a 100 gram sample of carbon-14 remaining after t years is represented by the equation c= 100 (0.99988)t
tigry1 [53]

Answer: The amount of carbon-14 remaining after 4 years is 99.95 grams.

Step-by-step explanation:

Hi, to answer this question we simply have to substitute t=4 in the equation given and solve for c.

c= 100 (0.99988)^t

c =100 (0.99988)^4

c = 100 x 0.999520086

c= 99.95200864 ≅99.95 grams (rounded)

The amount of carbon-14 remaining after 4 years is 99.95 grams.

Feel free to ask for more if needed or if you did not understand something.

8 0
3 years ago
3x + 7 - x = 21 x =
frosja888 [35]

Answer:

x=7/19

Step-by-step explanation:

R u looking for the value of x???

If so happy I could help if not elaborate in the comments

5 0
3 years ago
-0.5x=3.6<br><br> F. -72<br> G. -7.2<br> H. 7.2<br> I. 72
masya89 [10]

Answer:

G

Step-by-step explanation:

3.6÷-0.5 is -7.2, so it's G

8 0
2 years ago
Suppose T= {-8,-4,0,4,8,12,16,20} and K= {-3,-2,-1,0,1,2,3,4,5,6}. What is T U K?
Ivanshal [37]
T U K  = { -8,-4, -3, -2, -1, 0, 1,2,3,4, 5,6,8,12,16,20}
3 0
3 years ago
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