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laiz [17]
4 years ago
11

Solve for n. 21n=15 Please help

Mathematics
2 answers:
love history [14]4 years ago
6 0

Hi there!

~ Solving: 21n=15

In this case, "n" is already by itself. Therefore we divide "21" by each side!

21n/21 = 15/21

When simplified, you get 5/7.

Therefore, our answer is 5/7.  

monitta4 years ago
4 0

Answer:

n = \frac{5}{7}

Step-by-step explanation:

Given

21n = 15 ( divide both sides by 21 )

n = \frac{15}{21} ← divide ( cancel) 15 and 21 by 3, thus

n = \frac{5}{7}

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The volume of a rectangular prism is 2x^3 - 6x^2 + 8x , and the volume of a cube is 27x^3. What is the total volume of the prism
AleksAgata [21]

Answer:

\displaystyle V_{P + C} = 29x^3 - 6x^2 + 8x

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify.</em>

<em />\displaystyle V_P = 2x^3 - 6x^2 + 8x<em />

<em />\displaystyle V_C = 27x^3<em />

<em />

<u>Step 2: Find Combined Volume</u>

  1. [Set up] Add:                                                                                                     \displaystyle V_P + V_C = V_{P + C}
  2. Substitute in variables:                                                                                    \displaystyle V_{P + C} = 27x^3 + 2x^3 - 6x^2 + 8x
  3. Combine like terms:                                                                                        \displaystyle V_{P + C} = 29x^3 - 6x^2 + 8x
8 0
3 years ago
Twenty-two more than a number is 47
Karo-lina-s [1.5K]

Answer:

the number is 25

Step-by-step explanation:

If the number is n, then twenty-two more is n + 22

which equals 47, so n+ 22 = 47

n = 47 - 22 = 25

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3 years ago
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Give an example of a real number, an imaginary number, and a complex number. Use examples that have not
irinina [24]

Answer:

Real number 5

Imaginary number 5i

Complex number 2+5i

Step-by-step explanation:

A real number is that number that can be represented on number line

There is no imaginary part in real number

Example of real number is 5

Imaginary number is that in which there is no real part

Example of imaginary number is 5i

When there is a combination of both real and imaginary part then number is called complex number

Example of complex number is 2+5i

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