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musickatia [10]
2 years ago
9

30

Mathematics
1 answer:
Anastasy [175]2 years ago
8 0

Answer:

182 square ft.

Step-by-step explanation:

if there's 7 rows of tiles and 26 tiles in each row, then you need to multiply 7 by 26

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a 30-ft ladder is leaning against a building The bottom of the ladder is 7 ft from the base of the building to the nearest foot
Artemon [7]
210 feet or if divided 4.2 / 4 feet
8 0
3 years ago
Rewrite the equation by completing the square 2x^2-20x=x^2-19
sergeinik [125]

Answer:

x = -1, 19

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>

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality

<u>Algebra I</u>

  • Standard Form: ax² + bx + c = 0
  • Factoring
  • Multiple Roots
  • Completing the Square: -b/(2a)

Step-by-step explanation:

<u>Step 1: Define</u>

2x² - 20x = x² - 19

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

  1. [Subtraction Property of Equality] Subtract x² on both sides:                     x² - 20x = -19
  2. Complete the Square [Addition Property of Equality]:                                 x² - 20x + 100 = -19 + 100
  3. [Complete the Square] Simplify:                                                                    (x - 10)² = 81
  4. [Equality Property] Square root both sides:                                                  x - 10 = ±9
  5. [Addition Property of Equality] Add 10 on both sides:                                 x = 10 ± 9
  6. Evaluate:                                                                                                          x = -1, 19
7 0
3 years ago
Read 2 more answers
Let f(x) = e^6x and g(x) = 8ln(x). Find and simplify g(f(−2)).
jonny [76]

Answer: -96

<u>Step-by-step explanation:</u>

f(x) = e⁶ˣ                 g(x) = 8 ln(x)

f(-2) = e⁶⁽⁻²⁾

       = e⁻¹²

                            g(e⁻¹²) = 8 ln(e⁻¹²)

                                      = 8(-12)          <em>ln and e cancel </em>

                                      = -96

4 0
2 years ago
#46<br> Evaluate the function f (x)=x + 4 when x = 3.
11Alexandr11 [23.1K]

Answer:

f(3) = 7

Step-by-step explanation:

f (x)=x + 4

Let x=3

f (3)=3 + 4

f(3) = 7

3 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B6%7D%20%20-%20%20%5Cfrac%7B1%7D%7B6%7D%20" id="TexFormula1" title=" \frac{
notka56 [123]
The answer is 1 over 6, 1/6.
Since the denominators (bottom numbers) are the same then they don't need to be changed and can therefore be simplified by subtraction.
4 0
2 years ago
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