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iragen [17]
2 years ago
12

Splitting a polygon into triangles is a method used in calculating the sum of the interior angles of a polygon. Using this metho

d, how many triangles does a 7-sided polygon contain?
A.
5.
B.
6.
C.
7.
D.
8.
Mathematics
1 answer:
ICE Princess25 [194]2 years ago
5 0
Lets say that a quadrilateral has been divided into two triangles<span>, so the interior angles add up to 2 × 180 = 360°. This pentagon has been divided into </span>three triangles<span>, so the interior angles add up to 3 × 180 = 540°. In the same way, a hexagon can be divided into </span>4 triangles<span>, a 7-sided polygon into </span>5 triangles <span>etc.
so your answer is A. 5
(^>^)</span>
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Which answer shows y + 2x &lt; 4x-3
vaieri [72.5K]

y + 2x < 4x - 3     <em>subtract 2x from both sides</em>

y < 2x - 3

y = 2x - 3

for x = 0 → y = 2(0) - 3 = 0 - 3 = -3 → (0, -3)

for x = 2 → y = 2(2) - 3 = 4 - 3 = 1 → (2, 1)

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8 0
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25x - 20y= -100<br><br> x-intercept:__________<br> y-intercept:__________
ICE Princess25 [194]

X = (-4, 0)

Y = (0, 5)

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claudias filing status on last years tax return was single, while Angelos was head of household. If both had taxable incomes of
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1378 more than angelo

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PLEASE HELP!!!!!!!!!!!!!
solniwko [45]

Answer:

the answer is c

Step-by-step explanation:

because it doesn't repeat the same number for example if it was two -1s it wouldn't be a function but positive and negative are different so yeah

6 0
3 years ago
6 ( x - 1 ) = 9( x - 4 ) solve for x<br>I'm giving points pls answer fast<br>​
Alex

Answer:

x = 10

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

Step-by-step explanation:

<u>Step 1: Define</u>

6(x - 1) = 9(x - 4)

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

  1. Distribute:                                   6x - 6 = 9x - 36
  2. Subtract 6x on both sides:        -6 = 3x - 36
  3. Isolate <em>x</em> term:                             30 = 3x
  4. Isolate <em>x</em>:                                      10 = x
  5. Rewrite:                                       x = 10

<u>Step 3: Check</u>

<em>Plug in x into the original equation to verify it's a solution.</em>

  1. Substitute in <em>x</em>:                    6(10 - 1) = 9(10 - 4)
  2. Subtract:                              6(9) = 9(6)

Here we see that the 2 expressions are exactly the same.

∴ x = 10 is the solution to the equation.

6 0
2 years ago
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