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Anna007 [38]
3 years ago
15

Find x (steps pls) | x - 7| = 2 (i dunt understand the | in the questions)

Mathematics
1 answer:
kirill [66]3 years ago
3 0

these two bars |  | mean <u>absolute value</u>

here's how to find x

| x - 7| = 2

first apply the absolute rule

x - 7 = 2                 x - 7 = -2

in both equations add 7 on both sides

x - 7 + 7 = 2 + 7       x - 7 + 7 = -2 + 7

then simplify the expressions

x = 9                         x = 5

now combine these two solutions to get your answer

x = 9 or x = 5

hopefully my explanation helps

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The answer is 1/6, or .16666...
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3 years ago
1. |4n-15|=|n|<br> 2. |2c+8|=|10c| <br> can you please show the work for both
Alja [10]

Problem 1

<h3>Answers: n = 3 or n = 5</h3>

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

Work Shown:

|4n - 15| = |n|\\\\4n - 15 = n \ \text{ or } \ 4n-15 = -n\\\\-15 = n-4n \ \text{ or } \ -15 = -n-4n\\\\-15 = -3n \ \text{ or } \ -15 = -5n\\\\-3n = -15 \ \text{ or } \ -5n = -15\\\\n = \frac{-15}{-3} \ \text{ or } \ n = \frac{-15}{-5}\\\\n = 5 \ \text{ or } \ n = 3\\\\

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

Problem 2

<h3>Answers: c = 1 or c = -2/3</h3>

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

Work Shown:

|2c+8| = |10c|\\\\2c+8 = 10c \ \text{ or } \ 2c+8 = -10c\\\\8 = 10c-2c \ \text{ or } \ 8 = -10c-2c\\\\8 = 8c \ \text{ or } \ 8 = -12c\\\\8c = 8 \ \text{ or } \ -12c = 8\\\\c = \frac{8}{8} \ \text{ or } \ c = \frac{8}{-12}\\\\c = 1 \ \text{ or } \ c = -\frac{2}{3}

8 0
3 years ago
Need help plz I need your help
Sholpan [36]

The answer would be $29 an hour, because 29 times 2 = 58 and 58+ 29 = 87


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3 years ago
Read 2 more answers
Find the volume of the figurebelow
djverab [1.8K]

The volume of figure is 2 m³

<h3>What is volume of triangular pyramid?</h3>

The volume of a triangular pyramid can be easily found out by just knowing the base area and its height and is given as Volume of a triangular pyramid = (1/3) Base Area × Height

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= 1/3* base area * height

= 1/3* 1/2* 4 * 1 * 3

= 1/3 * 2 * 3

= 2 m³

Learn more about Volume here:

brainly.com/question/21864491

#SPJ1

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What is the solution to the inequality 13 x + 3 &lt; 42 ?
zepelin [54]

Answer:

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Step-by-step explanation:

Here is the solution:

-3x-42 > 3

Add the numbers

-3x > 45

Divide both sides of the inequation by -3 and flip the inequality sign.

x < -15

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3 years ago
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