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Tpy6a [65]
2 years ago
6

Evaluate the following:81¾​

Mathematics
1 answer:
Olin [163]2 years ago
5 0

Answer:

81\frac{3}{4}

Step-by-step explanation:

Sorry this question does not sense.....             81\frac{3}{4}    is evaluated  

maybe I don't understand the terminology

You might be interested in
Solve y In terms of x
miss Akunina [59]

the answer is y=3x-6

subtract 6x on both sides → -2y=-6x+12

divide both sides by -2y → y=3x-6


4 0
3 years ago
Read 2 more answers
GreenBeam Ltd. claims that its compact fluorescent bulbs average no more than 3.24 mg of mercury. A sample of 25 bulbs shows a m
amm1812

Answer:

Null hypothesis:\mu \leq 3.24  

Alternative hypothesis:\mu > 3.24  

Step-by-step explanation:

1) Previous concepts  and data given

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

A right tailed test (sometimes called an upper test) is when the alternative hypothesis statement contains a greater than (>) symbol.

\bar X=3.29 represent the sample mean  

s represent the sample standard deviation

n represent the sample selected

\alpha significance level  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean for fluorescent bulbs is no more than 3.24 mg of mercury, the system of hypothesis would be:  

Null hypothesis:\mu \leq 3.24  

Alternative hypothesis:\mu > 3.24  

IIf we know the population deviation we can apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

3 0
3 years ago
Paulo has $145 in his savings account. He earns $36 a week moving lawns. If Paulo saves all of his earnings, after how Many week
kondor19780726 [428]

Answer:

433-145=288

288/36=8

answer=8

Step-by-step explanation:


6 0
3 years ago
The mean of the heights of three buildings A,B and C is 14.2m. The mean of the heights of five buildings A,B,C, D and E is 14.8m
Jobisdone [24]
<h3>Answer:  15.7 meters</h3>

========================================================

Work Shown:

s = sum of the heights of buildings A,B,C

s/3 = mean of the heights of buildings A,B,C

s/3 = 14.2

s = 3*14.2

s = 42.6

The buildings A,B,C have their heights add up to 42.6

--------------

r = sum of the heights of buildings A,B,C,D,E

r/5 = mean of the heights of buildings A,B,C,D,E

r/5 = 14.8

r = 5*14.8

r = 74

--------------

r-s = (sum of heights of A,B,C,D,E)-(sum of heights of A,B,C)

r-s = sum of the heights of buildings D and E

r-s = 74-42.6

r-s = 31.4

(r-s)/2 = mean height of buildings D and E

(r-s)/2 = 31.4/2

(r-s)/2 = 15.7 meters is the average height of buildings D and E.

4 0
2 years ago
Help me Help me Help me Help me Help me Help me Help me Help me Help me Help me Help me Help me Help me Help me Help me Help me
Kay [80]

Answer:

$88.72 (89 dollars for a hat dude what a good deal. Finn officially fell for the trap. Watch episode 2 of Affording to buy a 100$ hat with Finn!)

Step-by-step explanation:

Step 1: Make an equation (98.58 x 90%)

Step 2: Solve (you can also do 98.58 x 0.9 to make it easier) and you get

$88.72

Hope this helps! :)

-jp524

PS: Hopefully Finn doesn't have mental issues because he is buying a "cheap" hat.

3 0
3 years ago
Read 2 more answers
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