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V125BC [204]
3 years ago
13

Evaluate -3- (-4) - (-2) + 1.

Mathematics
1 answer:
Shtirlitz [24]3 years ago
8 0

Answer:

4

Step-by-step explanation:

-3+4+2+1=4

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How quickly do synthetic fabrics such as polyester decay in landfills? A researcher buried polyester strips in thes oil for diff
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Answer:

no enough evidence to draw up a conclusion

Step-by-step explanation:

Data:

let: \mu _{1} = decay after 2 weeks

    \mu _{2} = decay after 16 weeks

Making the hypotheses:

Null hypothesis; H_{o} = \mu _{1}  - \mu _{2} = 0

the deviation = 0.05

the standard difference  = 4

Conditions:

The normal distribution curve can be plotted on a graph and the plot shows that the distribution is a skewed distribution.

Then,

t = \frac{(123.8-16.4)-0}{\sqrt{\frac{4.6^{2} }{5}+\frac{16.09^{2} }{5}   } } \\  = 0.989

Therefore, it can be concluded that 0.1983 > 0.05. This presents our failure to reject the null hypothesis.

Thus, there is not enough evidence to conclude that polyester decays more in less than 2 weeks.

5 0
3 years ago
Solve for x.<br> Explain each step you took to solve this question.<br> 30<br> (9x-3)
lapo4ka [179]
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3 0
3 years ago
When you study algebra, you see relationships in the form of graphs, tables, and equations. These relationships connect independ
Llana [10]
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3 0
3 years ago
What are the possible rational zeros of f(x)=x^4+2x^3-3x^2-4x+20?
Mice21 [21]
Roots test tells us to take the factors of the 20 divided by the factors of the coefficient of the the first.  

factors of 20 are 1,2,4,5,10,20
factors of 1 are 1

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8 0
3 years ago
Divide, need help again ppl, thanks!​
7nadin3 [17]

Answer:

<h2>√2,2√4</h2>

Step-by-step explanation:

<h2>√2,√8</h2><h2>√2,√4×2</h2><h2>√2,√2×2×2</h2><h2>√2,√2×2 2</h2><h2>√2,2√4 answer</h2>
4 0
2 years ago
Read 2 more answers
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