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Salsk061 [2.6K]
3 years ago
12

What is the value of x? Enter your answer in the box. °

Mathematics
1 answer:
mote1985 [20]3 years ago
3 0

Answer:

x = 84

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

Here n = 5, thus

sum = 180° × 3 = 540°

Sum the interior angles and equate to 540 for x

131 + 108 + 107 + 110 + x = 540, that is

456 + x = 540 ( subtract 456 from both sides )

x = 84

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Valentin [98]
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7 0
3 years ago
For exercises 1-4. use the drawing and an inch ruler to find the actual length and width of each section of the park. Measure to
julsineya [31]

Answer:

Step-by-step explanation:

Isaiah Let's solve this by rewriting the actual measurements the two boys have with their uncertainties. Krisann has a measuring tape to the nearest quarter inch. So his measurement may be off by half that, or and eighth of an inch. So his measurement is 27.75 ± 0.125. Isaiah has a measuring tape to the nearest eighth inch. So his measurement may be off by up to a sixteenth of an inch. So his measurement is 27.75 ± 0.0625 Now which is more precise, 27.75 ± 0.125, or 27.75 ± 0.0625? The answer is pretty obvious with 27.75 ± 0.0625 being the more precise measurement. And that value is from Isaiah.

4 0
2 years ago
I need help solving this problem, please respond as fast as you can.<br><br> -7 – 3x = 1x + 4(2 + x)
Ratling [72]

Answer:

x = -15/8

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  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

-7 - 3x = 1x + 4(2 + x)

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Distribute 4:                                                                                                    -7 - 3x = x + 8 + 4x
  2. Combine like terms:                                                                                       -7 - 3x = 5x + 8
  3. [Addition Property of Equality] Add 3x on both sides:                                -7 = 8x + 8
  4. [Subtraction Property of Equality] Subtract 8 on both sides:                      -15 = 8x
  5. [Division Property of Equality] Divide 8 on both sides:                               -15/8 = x
  6. Rewrite/Rearrange:                                                                                        x = -15/8
6 0
3 years ago
How many three-digit even numbers are possible if the leftmost digit cannot be zero?
Sonbull [250]

Answer:

  450

Step-by-step explanation:

There are 900 3-digit numbers in the range 100–999. Of those, exactly half are even numbers.

There are 450 even three-digit numbers.

5 0
3 years ago
I need help with this pls:)
kompoz [17]

Answer:

it is number 3 i actually did this one not even to long ago have a good day

8 0
3 years ago
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