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Semenov [28]
3 years ago
10

|a| if a>0 Please help!

Mathematics
2 answers:
Mariana [72]3 years ago
7 0

Answer:

1/a > 0

Step-by-step explanation:

JulijaS [17]3 years ago
6 0

Answer:

Step-by-step explanation:

the absolute value bars mean we ignore the sign of the variable

As (a) is always positive for a>0,   |a| = a

For contrast, If the range were a<0 where (a) is always negative, then |a| = -a

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A researcher selects all of the possible samples with n = 8 scores from a population and computes the mean, dividing by n, for e
Nadusha1986 [10]

Answer:

By the Central Limit Theorem, the average value for all of the sample means is 14.

Step-by-step explanation:

We use the central limit theorem to solve this question.

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means of size n can be approximated to a normal distribution with mean \mu and standard deviation, which is also called standard error s = \frac{\sigma}{\sqrt{n}}

If the population mean is μ = 14, then what is the average value for all of the sample means?

By the Central Limit Theorem, the average value for all of the sample means is 14.

3 0
4 years ago
Write an equation of the line that passes through the points (1, 2) and (-2, 5)
igor_vitrenko [27]

Answer:

y=-1x+3

y-2=3(x-1)

Step-by-step explanation:

Slope: -1

y-intercept: 3

5 0
3 years ago
Tests show that the hydrogen ion concentration of a sample of apple juice is 0.0003 and that of ammonia is 3.1 x 10^-9. Find the
scoundrel [369]
PH can be calculated using the following equation 
pH = -log [H₃O⁺]
for apple juice the hydronium /hydrogen ion concentration is 0.0003
pH = -log (0.0003)
pH = 3.5
correct answer is C

For ammonia 
pH = -log (3.1 x 10⁻⁹)
pH = 8.5 
answer should be 8.5
5 0
3 years ago
Read 2 more answers
I need helpASAP!! Which point would map onto itself after a reflection across the line y = –x?
Maru [420]
(0,-4) would map into itself because it doesn’t move.
7 0
3 years ago
2cm
harkovskaia [24]

Answer:

C

Step-by-step explanation:

Retangular prisms volume= lengthxwidthxheight

therefor you have to include all three number making you answer C

7 0
3 years ago
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