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kotykmax [81]
3 years ago
6

Given the function below, find f(-7) f(x) = -2x -1

Mathematics
1 answer:
kondor19780726 [428]3 years ago
3 0

Answer:

B

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>Algebra I</u>

  • Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = -2x - 1

f(-7) is x = -7

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em>:                    f(-7) = -2(-7) - 1
  2. Multiply:                               f(-7) = 14 - 1
  3. Subtract:                              f(-7) = 13
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Answer:

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Step-by-step explanation:

Let

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Cost of One pen = y

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36x+80y=190.84\\55x+80y=266.65\\-\:\:\:\:-\:\:\:\;\:\:\:\:\:\:\:-\\---------\\-19x=-75.81\\x=\frac{-75.81}{-19}\\x=3.99\\

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Now, putting value of x in equation 1 to find value of y.

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