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olya-2409 [2.1K]
4 years ago
15

8x-19 = -12x+61 What is x?

Mathematics
1 answer:
olasank [31]4 years ago
3 0

Answer:

x is 4

Step-by-step explanation:

Step one: Add 12x to both sides-

8x-19+12x=-12x+61+12x

20x-19=61

Step 2: add 19 to both sides

20x -19+19=61+19

20x=80

Step 3: divide both sides by 20

20x/20=80/20

x=4

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1.873, 1.9, 1.78, 1.84, 1.779, 1.742<br><br> LESSER GREATER<br><br><br> ASAP PLEASE
Musya8 [376]

Answer:

Lesser to greater

Step-by-step explanation:

1.742

1.779

1.78

1.84

1.873

1.9

8 0
3 years ago
Solve for x. 7(x - 3) = 4(x + 5) x =1/11 x =1/3 x =41/11 x =41/3
marin [14]
To solve for the x, distribute first the numerical coefficients to the terms on the parentheses. This becomes,
   
                                          7x - 21 = 4x + 20

Transpose all the terms with x and the constant on either sides of the equation,
 
                                           7x - 4x = 20 + 21
  
                                        3x = 41   ;    x = 41 / 3

Thus, the answer is x = 41/3 which is fourth among the choices. 

6 0
4 years ago
A 1,200g block of phosphorus-32, which has a half life of 14.3 days, is stored for 100.1 days. At the end of this period, how mu
Valentin [98]

Answer:

The amount of phosphorus-32 left after 100.1 days is <u>9.3 g</u>.

Step-by-step explanation:

Given:

Initial amount of Phosphorus-32 is, N_0=1200\ g

Time period of decay is, t=100.1\ days

Half life of the block is, t_{1/2}=14.3\ days

Now, final amount left is, N=?

We know that, the decay equation for a radioactive material is given as:

N=N_0e^{-kt}\\k\to decay\ constant

The value of the decay constant is given as:

k=\frac{\ln 2}{t_{1/2}}\\\\k=\frac{0.693}{14.3}=0.0485

Now, plug in all the given values and calculate 'N'. This gives,

N=(1200)e^{(-0.0485\times 100.1)}\\\\N=9.349\approx 9.3\ g

Therefore, the amount of phosphorus-32 left after 100.1 days is 9.3 g

5 0
3 years ago
Hhhhellllllllllpppppppppppp
katovenus [111]

Answer:

D?

(its blurry-

Step-by-step explanation:

5 0
3 years ago
-18x + 20y = 12<br> -9x + 10y = 6<br><br> X=what <br> Y=what
Maksim231197 [3]

Answer:

x is 2.25 and y is 1

Step-by-step explanation:

-18*2.25 = -8

20*1 = 20

-8 + 20 = 12

-9*2.25 = 4

10*1 = 10

-4 + 10 = 6

so

X = 2.25

Y = 1

6 0
3 years ago
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