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DerKrebs [107]
3 years ago
6

What is 9/10 + (-4/5)?

Mathematics
2 answers:
kolezko [41]3 years ago
7 0

Answer:

1/10

Step-by-step explanation:

4/5=8/10

9/10-8/10=1/10

iogann1982 [59]3 years ago
5 0
The answer is to 9/10 plus (-4/5) is 0.1
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Nesterboy [21]
The correct answer is B) the cost of removing 80% of pollutants is $196,000.

Using the equation, we have
240(80)/(100-80) = 240(80)/20 = 196

Since this is in thousands of dollars, we have 196,000.

Using the equation, A is not correct; it would be 160,000.

The vertical asymptote would be at 100%.

B must be the correct answer.
6 0
3 years ago
Use the reciprocal property to solve for x:
Natali5045456 [20]

Answer:

The answer is 1800.

Step-by-step explanation:

3/540 = 10/x

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6 0
3 years ago
The authors of a paper presented a correlation analysis to investigate the relationship between maximal lactate level x and musc
ArbitrLikvidat [17]

Answer:

a) Sample correlation coefficient, r = 0.7411

bi) test statistic, t = 4.102

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Step-by-step explanation:

a) The formula for the sample correlation coefficient is given by the formula:

r = \frac{S_{xy} }{\sqrt{S_{xx} S_{yy} }} }

S_{xx} = 2,648,130.357\\S_{yy} = 36.7376,\\S_{xy} = 7408.225

r = \frac{7408.225}{\sqrt{2648130.357*36.7376} }

r = 0.7511

b)

i) formula for the test statistic is given by the formula:

t = \frac{r\sqrt{n-1} }{\sqrt{1 - r^{2} } }

sample size, n = 4

t = \frac{0.7511\sqrt{14-1} }{\sqrt{1 - 0.7511^{2} } }

t = 4.102

ii) Degree of freedom, df = n -2

df = 14 -2

df = 12

The P-value is calculate from the degree of freedom and the test statistic using excel

P-value =(=TDIST(t,df,tail))

P-value = (=TDIST(4.1,12,1)

P-value = 0.000736

4 0
3 years ago
Set up the equation for the area of a triangle in
notsponge [240]

Answer:

A=133 A=71.5 A=31.5 A=1

Step-by-step explanation:

6 0
3 years ago
One-fourth of r subtracted from ten is greater than five
rosijanka [135]
Im not 100% about how this question is explained or written but i think its 8
8 0
3 years ago
Read 2 more answers
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