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ioda
3 years ago
11

Isabella purchased 3 books from the book store. She now owns 11 books that she wants to read before the end of the year. If x re

presents the number of books she started with, which equation could be used to determine the value of x?
Mathematics
2 answers:
Alik [6]3 years ago
4 0
I'm not too sure on the answer choices you have but I'd say the equation is either
x = 11 - 3
or
x + 3 = 11
Annette [7]3 years ago
4 0
11-3=x is the answer
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Step-by-step explanation:

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2 years ago
Write the quadratic equation in standard form:<br> 7x + 8 + 2x2<br> 2x + 1 + x2
JulsSmile [24]

Answer:

3x^2 + 9x  +9

Step-by-step explanation:

Given

(7x + 8 + 2x^2) + (2x + 1 + x^2)

Required

The result in standard form

We have:

(7x + 8 + 2x^2) + (2x + 1 + x^2)

Remove brackets

7x + 8 + 2x^2 + 2x + 1 + x^2

Collect like terms

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ax^2 + bx + c

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9x  + 9+ 3x^2

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5 0
2 years ago
Find the slope given: (3, -10) &amp; (4, -21)<br> m =
AleksAgata [21]

Answer:

\displaystyle m=-11

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)
  • Slope Formula: \displaystyle m=\frac{y_2-y_1}{x_2-x_1}

Step-by-step explanation:

<u>Step 1: Define</u>

Point (3, -10)

Point (4, -21)

<u>Step 2: Find slope </u><em><u>m</u></em>

Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>

  1. Substitute in points [Slope Formula]:                                                             \displaystyle m=\frac{-21+10}{4-3}
  2. [Fraction] Add/Subtract:                                                                                 \displaystyle m=\frac{-11}{1}
  3. [Fraction] Divide:                                                                                             \displaystyle m=-11
3 0
2 years ago
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Natalija [7]

Answer:

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Step-by-step explanation:

recall that 81 = 3 x 3 x 3 x 3 = 3⁴

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= 3^{(4)(1/4)}

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4 0
3 years ago
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