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disa [49]
3 years ago
12

Find the perimeter of the rectrangle with vertices at R(-2, 3), S(4, 3), T(4, -1) and U(-2, -1).

Mathematics
1 answer:
mylen [45]3 years ago
5 0
I attached a photo where I graphed these vertices in order to count the length and width.  After counting the number of units between R & U I got a width of 4.  And then I counted the units between S & T to get a width of 6.  Using the formula to calculate the perimeter of a rectangle, P = 2(l+w). The perimeter is 20.  

First I added the length plus the width, 4 + 6 and got 10.  Then I did 10 x 2 which is how I got a perimeter of 20.  

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-9=k-6
Shkiper50 [21]

Answer:

k = -3

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>

-9 = k - 6

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

  1. Add 6 to both sides:                    -3 = k
  2. Rewrite:                                         k = -3
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