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guajiro [1.7K]
3 years ago
9

9 - 4(2x - 1) = 45 please help​

Mathematics
1 answer:
ddd [48]3 years ago
5 0

Answer:

x=-4

Step-by-step explanation:

9-4(2x-1)=45

First, we expand the equation using the distributive rule:

x(y-z)=xy-xz

Hence, 9-4*2x-4*-1=45

Simplify: 9-8x+4=45

Add like terms:

13-8x=45

Subtract 13 from both sides: -8x=32

Divide both sides by -8:

x=-4

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Given that f(x) = x^2 – 2x - 63 and g(x) = x + 7, find (f - g)(x)
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Answer:

(f - g)(x) = x² - 3x - 70

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Distributive Property

<u>Algebra I</u>

  • Combining Like Terms

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = x² - 2x - 63

g(x) = x + 7

(f - g)(x) is f(x) - g(x)

<u>Step 2: Find (f - g)(x)</u>

  1. Substitute:                               (f - g)(x) = x² - 2x - 63 - (x + 7)
  2. Distribute -1:                            (f - g)(x) = x² - 2x - 63 - x - 7
  3. Combine like terms (x):          (f - g)(x) = x² - 3x - 63 - 7
  4. Combine like terms (Z):          (f - g)(x) = x² - 3x - 70
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Step-by-step explanation:

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