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densk [106]
4 years ago
6

2X+15= -3x how do you work this equation​

Mathematics
2 answers:
Sphinxa [80]4 years ago
8 0

Answer: x=-3

<u>Add 3x to both sides</u>

<u></u>2x+15+3x=-3x+3x\\5x+15=0<u></u>

<u></u>

<u>Subtract 15 from both sides</u>

<u></u>5x+15-15=0-15\\5x=-15<u></u>

<u></u>

<u>Divide both sides by 5</u>

<u></u>5x/5=-15/5\\x=-3<u></u>

yuradex [85]4 years ago
3 0

Answer:

x = -3

Step-by-step explanation:

2x + 15 = -3x     (try to move the x-terms to one side, add 3x to both sides)

2x + 15 + 3x = 0

5x + 15 = 0 (subtract 15 from both sides)

5x = 0 - 15

5x = -15    (divide both sides by 5)

x = -15 ÷ 5

x = -3

Hope this helps!

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If y=3x+5 and z=x^2+2x-5, what is yz?
Hitman42 [59]
<h3>Answer:  3x^3 + 11x^2 - 5x - 25</h3>

Work Shown:

yz = y(x^2+2x-5)

yz = y(x^2) + y(2x) + y(-5)

yz = x^2( y ) + 2x( y ) - 5( y )

yz = x^2( 3x+5 ) + 2x( 3x+5 ) - 5( 3x+5 )

yz = x^2*3x + x^2*5 + 2x*3x + 2x*5 - 5*3x - 5*5

yz = 3x^3 + 5x^2 + 6x^2 + 10x - 15x - 25

yz = 3x^3 + 11x^2 - 5x - 25

6 0
2 years ago
Felicia’s mother is four times as old as Felicia. In 16 years, her mother will be twice her age. How old is Felicia now?
dexar [7]

Answer:

16

Step-by-step explanation:

Now:16 x 2 = 32

16 years:32 x 2 =64

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6 0
3 years ago
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Can i have some Word problem help?
Reika [66]

The power in C is correct. it is x / 37 So B,C and D all have the correct power. Now you must turn to the base. You are talking about a half life so what is raised to the the correct power must be 1/2

That eliminates D and C both. 

A is gone because it has the wrong power. 

B <<<< the first part of the question's answer.

Now we will answer the 6 days part.

y = 477 * (1/2) ^(x / 37)
x = 6
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The answer is C
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3 years ago
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I think the answer would be 7/50
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