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velikii [3]
3 years ago
14

1. change .84 to a fraction, reduced

Mathematics
1 answer:
Inga [223]3 years ago
5 0

Answer:

1. 21/25

2. 72

3. -4

4. Typo?

2I+2w= 33

21+2w=34

5. Dont understand this question withought context

Step-by-step explanation:

1. 84/4 and 100/4 is 21/25

2. 3(6)(-4) miltiplication

3. worry about parenthesis first, a positive plus a negatative goes to minus so 6-4 then multiply 2 times -2 and get -4

4.

2I+2w is 2(10)+2(6.5)

21+2w is 21+2(6.5)

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A radioactive material is an element that is highly unstable due to its high neutron-to-proton ratio. Because of this, they spontaneously undergo nuclear reaction under nuclear fission releasing subparticles. The time it took to consume half of the original amount of the radioactive material is called the half-life.

The equation is <span>a2=ae^(−9.753t), where a2 is the concentration after time t and a is the original concentration. The ratio of a2/a should be 0.5/1 or 1/2. Therefore,
a2/a = e^(-9.753t)
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ln(0.5) = lne^(-9.753t)
ln(0.5) = -9.753t
t = 0.071 days or 1.7 hours.


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4 0
3 years ago
What is the 6th term in the expression (2x-y)^10
Elis [28]

Hello from MrBillDoesMath!

Answer:

- 8064 x^5 y^5



Discussion:

The binomial theorem gives us the expansion  of  (a + b) ^n  :

(a + b ) ^n

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In our case, taking the 6th term above, setting a = 2x, b = -y, and n = 10 gives

( (10*9*8*7*6)/ (5 *4*3*2*1) )  * (2x)^5 (-y)^5r

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4 0
3 years ago
HELPPPPPPPThe police heighten patrols in a certain neighborhood corresponding to Rectangle EFGH,
Maru [420]

Answer:

57.2 units^2

Step-by-step explanation:

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The attachment explains an approach of using right triangles to find the base and height of the parallelogram.  

I'm not confident this was the best approach, so I hope someone would comment if a simpler solution is available.

3 0
2 years ago
10=−4x+3x^2 solve<br><br> please help!
kumpel [21]

Answer:

-1.28 AND 2.61

Step-by-step explanation:

10= -4x+3x^2\\ 3x^2 -4x - 10 = 0\\\\

use quadratic formula

x =  \frac{-b+\sqrt{b^{2} -4ac} }{2a}   x =  \frac{-b-\sqrt{b^{2} -4ac} }{2a}

Solution/X-Intercepts: -1.28 AND 2.61    

6 0
3 years ago
Yx20=30 help help help
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4 0
4 years ago
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