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swat32
2 years ago
11

Please help asap!' 9th grade math!!

Mathematics
1 answer:
Misha Larkins [42]2 years ago
5 0
2x + 3y = 9
3y = -2x + 9
y =-2/3+3


5x + y = - 10
y=-5x-10

5x - y = 7
- y = - 5x + 7
y = 5x - 7

slope is 5/1

y intercept is -7/1
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Subtract original amount from new amount:

84 - 39 = 45

He bought 45 books.

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Juan bought a gift for his friend. He wants to place the gift in a package with the length of 8 inches, width of 7 inches, and t
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5c + 9c <br><br>Show your solution! tyms​
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Which expression represents the distance between the points (11, 4) and (5,8)?
antiseptic1488 [7]

Answer:

\displaystyle d = 2\sqrt{13}

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> </u>

<u>Algebra I</u>

  • Coordinates (x, y)

<u>Algebra II</u>

  • Distance Formula: \displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Step-by-step explanation:

<u>Step 1: Define</u>

Point (11, 4) → x₁ = 11, y₁ = 4

Point (5, 8) → x₂ = 5, y₂ = 8

<u>Step 2: Find distance </u><em><u>d</u></em>

Simply plug in the 2 coordinates into the distance formula to find distance <em>d</em>

  1. Substitute in points [Distance Formula]:                                                       \displaystyle d = \sqrt{(5-11)^2+(8-4)^2}
  2. [√Radical] (Parenthesis) Subtract:                                                                 \displaystyle d = \sqrt{(-6)^2+(4)^2}
  3. [√Radical] Evaluate exponents:                                                                    \displaystyle d = \sqrt{36+16}
  4. [√Radical] Add:                                                                                               \displaystyle d = \sqrt{52}
  5. [√Radical] Simplify:                                                                                         \displaystyle d = 2\sqrt{13}
4 0
3 years ago
The hotdog eating champion, ate 13 hot dogs every 2 minutes at the county fair contest. How long did it take him to eat 91 hot d
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They ate 13 hot dogs in 2 minutes, so divide 13 by 2 to find out how many hot dogs he ate in 1 minute:

13 / 2 = 6.5 hot dogs per minute.

Now divide total hot dogs eaten by 6.5 to get the total time:

91 / 6.5 = 14 total minutes.

5 0
3 years ago
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