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stealth61 [152]
3 years ago
5

If 3x -4=-1, what is the value of 12x+3?

Mathematics
1 answer:
Nataly [62]3 years ago
7 0
A possible answer could be 9
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A certain radioactive isotope decays at a rate of 2% per 100 years. if t represents time in years and y represents the amount of
gregori [183]
We rewrite the equation:
 y = y0 * e ^ (- 0.0002 * t)
 In this equation:
 I = represents the initial amount of the isotope
 We have then:
 89% of the isotope left:
 0.89 * y0 = y0 * e ^ (- 0.0002 * t)
 We clear the time:
 e ^ (- 0.0002 * t) = 0.89
 Ln (e ^ (- 0.0002 * t)) = Ln (0.89)
 -0.0002 * t = Ln (0.89)
 t = Ln (0.89) / (- 0.0002)
 t = 582.6690813
 round to the nearest year:
 t = 583 years
 Answer:
 
There will be 89% of the isotope left in about:
 
t = 583 years
7 0
3 years ago
Find the value of x<br> (6x + 7)°<br> (8x - 17)°
Vlad [161]
<h3>Answer:  x = 12</h3>

Explanation:

The two angles shown are vertical angles. This occurs whenever you have an X shape like this, and whenever the angles are opposite one another. Vertical angles are always congruent.

6x+7 = 8x-17

6x-8x = -17-7

-2x = -24

x = -24/(-2)

x = 12

6 0
3 years ago
The formula for the perimeter of a rectangle can be written as P= 2(l+w). Solve the formula for the length l.
Ronch [10]

Undo what is done to l. l has w added and the sum multiplied by 2, so divide by 2 and subtract w:

... l = P/2 -w

5 0
3 years ago
Tina kept a record of the amount of rainfall at her house each month. January had 3.331 February had 3.133 March had 3.313 and A
yawa3891 [41]

Answer:

3.331 , 3.313 , 3.133 , 1.333

Step-by-step explanation:

because it just is that way

4 0
3 years ago
Can you help me out ​
Advocard [28]
The answer is 20

Your welcome
8 0
2 years ago
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