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2 years ago

I solved this problem : 33 + 45 + 78 how could i check my answer?

2 answers:

7 0

You can check the answer by: adding the numbers together, then add only 2 of the numbers together and subtract the sum of the 2 numbers that you added, from the sum of all of the numbers. for the answer, you should get the number that you left out.

i hope this helped! :)

Vlad [161]2 years ago

4 0

Step-by-step explanation:

So the answer for 33+45+78 is 156.

If you want to check that, you can use inverse operations, so subtract.

156-78=78. (Check 78)

78-45=33 (Check 45 and 33)

Well, now it's checked because we used all the factors of the equation!

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there are 60 tables in a restaurant, with 25% of them seating 2 people. The tables remaining seat 4 people. How many seats are t

Romashka-Z-Leto [24]

Do 60*0.25 and that's 15. 15 tables seat 2 people. we can also confirm this by doing 15*4 which is 60 (the total amount of tables) since 25%*4=100. then we know the rest of them fit 4 and 60-15=45. Now we do (15*2) + (45*4). {one for the 2 seated tables and the other for the 4 seated ones.} 30+180=210 seats.

4 0

2 years ago

The time (in number of days) until maturity of a certain variety of tomato plant is Normally distributed with mean μ. You select

VLD [36.1K]

Answer: 60.93 < μ < 69.07

Step-by-step explanation: The true mean of a set of data is between an interval of values with a percentage of precision, e.g., a <u>99% confidence interval</u> means we are 99% confident the true mean is between the lower and upper limits.

To find the interval, use

x± $z\frac{s}{\sqrt{n}}$

z is z-score related to the % of confidence level

In this case, a 99% confidence interval is 2.576

x is sample mean

Calculating:

$x=\frac{63+69+62+66}{4}$

x = 65

65± $2.576\frac{3.16}{\sqrt{4}}$

65±4.07

Confidence Interval: 60.93 < μ < 69.07

Meaning that we are 99% sure the population means is between 60.93 and 69.07.

7 0

2 years ago

If the outliers are not included, what is the mean of the data set?

ioda

If you don't include the outlier (50) then it is 79.7

4 0

2 years ago

Read 2 more answers

A Lake Tahoe Community College instructor is interested in the mean number of days Lake Tahoe Community College math students ar

Vlad1618 [11]

Answer:

Step-by-step explanation:

Hello!

The population is the set of elements that you are interested in studying. In this example, the instructor wants to know the number of days Lake Tahoe Community College math students are absent from class during a quarter. To do so she will take a random sample of math students and register the number of absences of each student. Each math student is an element of the population.

Then the population is "Lake Tahoe Community College math students"

I hope it helps!

6 0

3 years ago

Wave Corporation began the current year with a retained earnings balance of $25,000. During the year, the company corrected an e

Hitman42 [59]

Answer:

$30,000.

Step-by-step explanation:

Wave Corporation began the current year with a retained earnings balance of $25,000.

Depreciation expense was of $5000

During the current year, the company earned net income of $15,000

Also gave cash dividends of $5,000.

So, year end retained earnings will be :

Year end retained balance = total net income minus net losses and dividends.

$25000-5000+15000-5000=30000$ dollars

The answer is $30,000.

7 0

2 years ago

I solved this problem : 33 + 45 + 78 how could i check my answer?​

I solved this problem : 33 + 45 + 78 how could i check my answer?