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ddd [48]
3 years ago
9

Solve this equation. 5n+7=7(n+1)-2n

Mathematics
2 answers:
Rus_ich [418]3 years ago
6 0
 5n+7=7(n+1)-2n
 5n+7=7n+7-2n
 5n-7n+2n=+7-7
0n=0
n=0-0
n=0

the answer is 0

hope this help
brainliest plz

9966 [12]3 years ago
3 0
Distribute 7 to both n and 1

7(n + 1) = 7n + 7

5n + 7 = 7n + 7 - 2n

Combine like terms

5n + 7 = 7n - 2n + 7

5n + 7 = 5n + 7

If you want to solve for n, subtract 7 from both sides

5n + 7 (-7) = 5n + 7 (-7)

5n = 5n

then divide 5 from both sides

5n/5 = 5n/5

n = n

Effectively, this equation is <em>unsolvable</em>

hope this helps
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No

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V = 180 cm3
l = 10 cm
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h = ?

V=lwh, so to get h, divide equation by lw, to get h=V/(lw).

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What is the radius of the Brazilian coin that has a circumference of 84.78 mm? Explain your work. Use 3.14 pi
ICE Princess25 [194]
Hey there!

Sorry If this answer is late, but here ya go.

To find the radius of this Brazilian coin, first multiply 3.14 by 2. This will give you and answer of 6.28. Then, divide 84.78 mm by this, and you will get your radius of 13.5.

Have a good day! And stay CRAZZZY! :D
3 0
3 years ago
Read 2 more answers
Megan wants to build a bird feeder she buys 8 1/2 feet long the cost of the wooden board is 2.50$ per foot what is the cost in d
VARVARA [1.3K]

Answer:

21.25

Step-by-step explanation:

so what I did was i x 8 and 1/2 by 2.50

4 0
3 years ago
Determine the equivalent system for the given system of equations:
Volgvan

Answer:

Step-by-step explanation:

5x+3y=1

4x-5y=4

--------------

4(5x+3y)=4(1)

-5(4x-5y)=-5(4)

----------------------

20x+12y=4

-20x+25y=-20

----------------------

37y=-16

y=-16/37

5x+3(-16/37)=1

5x-48/37=1

5x=1+48/37

5x=37/37+48/37

5x=85/37

x=(85/37)/5

x=(85/37)(1/5)

x=85/185

x=17/37

Answer: x=17/37, y=-16/37. (17/37, -16/37)

-----------------------------

5x+3y=1

8x-10y=4

-----------------

8(5x+3y)=8(1)

-5(8x-10y)=-5(4)

----------------------

40x+24y=8

-40x+50y=-20

----------------------

75y=-12

y=-12/75=-4/25

5x+3(-4/25)=1

5x-12/25=1

5x=1+12/25

5x=25/25+12/25

5x=37/25

x=(37/25)/5

x=(37/25)(1/5)

x=37/125

Answer: x=37/125, y=-4/25. (37/125, -4/25).

-------------------------------

5x+3y=1

9x-2y=5

---------------

2(5x+3y)=2(1)

3(9x-2y)=3(5)

---------------------

10x+6y=2

27x-6y=15

---------------

37x=17

x=17/37

5(17/37)+3y=1

85/37+3y=1

3y=1-85/37

3y=37/37-85/37

3y=-48/37

y=(-48/37)/3

y=(-48/37)(1/3)

y=-48/111

Answer: x=17/37, y=-48/111. (17/37, -48/111).

--------------

6 0
3 years ago
Read 2 more answers
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