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Zepler [3.9K]
3 years ago
6

Find the value of y in the equation y=-4x+9 when x=-3

Mathematics
2 answers:
Alla [95]3 years ago
7 0
Y =21
-4x-3 =12
12+9=21
Katena32 [7]3 years ago
6 0

Answer:

y = 21

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

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

y = -4x + 9

<em>x</em> = -3

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em> [Equation]:                                                                                y = -4(-3) + 9
  2. Multiply:                                                                                                             y = 12 + 9
  3. Add:                                                                                                                   y = 21
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