Answer:

Step-by-step explanation:
Let
j ------> the number
we know that
The square of a number is equal to multiply the number by itself
so
The square of j is

so
Two-fifths of the square of a number j is the same that multiply the fraction 2/5 by the square of j

The surface area of the rectangular prism is of 144 m².
<h3>What is a rectangular prism?</h3>
A rectangular prism is a solid that has three dimensions:
It's surface area is given by:

In this problem, the dimensions are:
.
Hence:
![S = 2[6(6) + 6(3) + 6(3)] = 144](https://tex.z-dn.net/?f=S%20%3D%202%5B6%286%29%20%2B%206%283%29%20%2B%206%283%29%5D%20%3D%20144)
The surface area of the rectangular prism is of 144 m².
You can learn more about surface area of a rectangular prism at brainly.com/question/17223528
The test score for a class are shown. What is the average test score? 79,80,92,92,81,100,88,98,71,100,91,90
Oksanka [162]
Answer:
The average score is equal to 88.5
Step-by-step explanation:
we know that
An average test score is the sum of all the scores on an assessment divided by the number of test-takers.
so
The sum is equal to
![Sum=[79+80+92+92+81+100+88+98+71+100+91+90]=1,062](https://tex.z-dn.net/?f=Sum%3D%5B79%2B80%2B92%2B92%2B81%2B100%2B88%2B98%2B71%2B100%2B91%2B90%5D%3D1%2C062)
The number of test-takers is n=12
The average score is equal to

substitute

False because a number is rational if we can write it as a fraction where the top number of and bottom number are both whole numbers but irrational numbers is any number that is not rational. It is a number that cannot be written as a ratio of two integers(or cannot be expressed as a fraction)
There are 4 terms.
The second term and the fourth term have negative coefficients.
Terms are only negative depending on the value of the variables.