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wlad13 [49]
3 years ago
15

Three is added to a number, and then the sum is multiplied by 4. The result is 16. Find the number.

Mathematics
2 answers:
pentagon [3]3 years ago
7 0
x-\ number\\\\
4(3+x)=16\\
12+4x=16\ \ \ |Subtract\ 12\\
4x=16-12\\
4x=4\ \ \ |Divide\ by\ 4\\
x=1\\\\ \textbf{Number\ is\ equal\ to\ 1.}
miskamm [114]3 years ago
4 0
(3+x)*4=16
Distributive property 
12+4x=16
-12       -12
4x-4

x=1


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Does anyone know the answers to this ? Pls help me out
Reptile [31]

Answer:

C. 4

Step-by-step explanation:

2x³+2x¹+2x+5+4/x-1

5 0
3 years ago
The proportion of a population with a characteristic of interest is p = 0.37. What is the standard deviation of the sampling dis
lukranit [14]

The standard deviation (SD) of a sample proportion obtained when the sample size is 1,600 is equal to 0.0121.

<h3>What is a sample proportion?</h3>

A sample proportion can be defined as the proportion of individuals in a sample that have a specified characteristic or trait.

Mathematically, sample proportion can be calculated by using this formula:

\hat{p} = \frac{x}{n}

Where:

  • x represent the number of individuals with a specified characteristic.
  • n represent the total number of individuals in a sample.

In Mathematics, the standard deviation (SD) of a sample proportion obtained when the sample size is 1,600 can be calculated by using this formula:

Standard deviation (SD) = √(p(1 - p)/n)

Substituting the given parameters into the formula, we have;

Standard deviation (SD) = √(0.37(1 - 0.37)/1,600)

Standard deviation (SD) = √(0.37(0.63)/1,600)

Standard deviation (SD) = √(0.2331)/1,600)

Standard deviation (SD) = √0.0001457

Standard deviation (SD) = 0.0121.

Read more on standard deviation here: brainly.com/question/14467769

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8 0
1 year ago
Janessa sleeps 7 1/2 hours each night. How many minutes does she sleep each night?
amm1812

Answer: 450 minutes

Step-by-step explanation: First you find 7 hours to minutes by multiplying 7 by 60. You will get 420. Then, add 420 and 30 because a half of an hour is 30 minutes. Your final answer will be 420 minutes!

Your welcome!

Good night!

6 0
2 years ago
At the movie theatre, child admission is $6.40 and adult admission is $9.70. On Monday, 155 tickets were sold for a total sales
Molodets [167]
Less than or equal to 121 adult tickets.


You would do 1180.10/9.70
 

Which equals 121


Since we don't know how many children tickets were, sold it could be less than or equal to 121.
3 0
3 years ago
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Answer:

B

Step-by-step explanation:

5.6 is bigger than 4.3

7 0
3 years ago
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