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aliina [53]
3 years ago
12

I need help solving for x the equation is 6x-42=4x

Mathematics
2 answers:
Mashutka [201]3 years ago
5 0
6x - 42 = 4x
6x - 4x -42 = 4x -4x
6x - 4x -42 + 42 = 42
6x - 4x = 42
2x = 42
x = 21
Alenkasestr [34]3 years ago
3 0
6x-42=4x
6x= 4x +42
2x= 42
x=21
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Answer:

(i) Approximately 3 half lifes

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Step-by-step explanation:

(i) ∵ The half life of Radon-222 is approximately 3.8 days,

So, the number of half life in 11.46 days = \frac{11.46}{3.8} ≈ 3

(ii) Since, the half life formula is,

N=N_0 (\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}

Where,

N_0 = initial quantity,

t = number of periods

t_{\frac{1}{2}} = half life of the quantity,

Given,

N = 5.2\times 10^{-8}\text{ g}

t = 11.46 days,

t_{\frac{1}{2}} = 3.8\text{ days}

\implies 5.2\times 10^{-8}=N_0 (\frac{1}{2})^\frac{11.46}{3.8}

\implies N_0=2^{\frac{11.46}{3.8}}\times 5.2\times 10^{-8}\approx 4.21\times 10^{-7}\text{ g}

7 0
4 years ago
Select all of the algebraic expressions that could represent the phrase below.
Yuliya22 [10]

Answer:

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Step-by-step explanation:

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2 years ago
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Answer:

It is a nonlinear function.

Step-by-step explanation:

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To find the solution of a system of equations, you can use the substitution, elimination, or graphing method. However, they gave you the graph.

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saveliy_v [14]

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4 0
3 years ago
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