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elena-s [515]
2 years ago
12

A number a is to the left of the number b on the number line how do the numbers -a and -b compare?

Mathematics
1 answer:
Leokris [45]2 years ago
8 0

Answer:

-a will be greater than -b because for example, when a=2 and b=5, -a=-2 and -b=-5

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Order these numbers in ASCENDING order. 0.7 2/3 6/8 65%​
Kryger [21]

Answer:

65%, 2/3, 0.7, 6/8

Step-by-step explanation:

4 0
3 years ago
A ticket to a movie for a student is $7. The cost for an adult is $2 mor than for a student. How much would it cost 5 adults and
yulyashka [42]
Adults: $45
Students: $203
Hope that’s correct
3 0
2 years ago
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.
valina [46]

Answer:

A sample of 179 is needed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.85}{2} = 0.075

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.075 = 0.925, so Z = 1.44.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

A previous study found that for an average family the variance is 1.69 gallon?

This means that \sigma = \sqrt{1.69} = 1.3

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

M = z\frac{\sigma}{\sqrt{n}}

0.14 = 1.44\frac{1.3}{\sqrt{n}}

0.14\sqrt{n} = 1.44*1.3

\sqrt{n} = \frac{1.44*1.3}{0.14}

(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2

n = 178.8

Rounding up

A sample of 179 is needed.

7 0
3 years ago
Help! Please!
fomenos

Answer:

is the board game to BOARD for Neal so you have 1.54

Step-by-step explanation:

its ligit 5.5

6 0
2 years ago
What is the difference between these fractions?<br><br> +3/4−(+7/8)
Ket [755]

Answer:

1/8

Step-by-step explanation:

3/4 is 6/8 and 6/8 - 7/8 is 1/8

4 0
2 years ago
Read 2 more answers
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