Math Problem Statement

Patrick is practicing evaluating functions. He is using the following functions.

f(x) = −6 + 14x g(x) = (2x + 9)2

He evaluates the functions for f(7) and g(−3). What values will he calculate?

Select TWO correct answers. A.9 B.−28 C.92 D.225 E.104

Solution

To solve for the values of f(7)f(7) and g(3)g(-3) using the given functions:

  1. Function f(x)=6+14xf(x) = -6 + 14x:

    • Substitute x=7x = 7 into the function: f(7)=6+14(7)=6+98=92f(7) = -6 + 14(7) = -6 + 98 = 92 So, f(7)=92f(7) = 92.
  2. Function g(x)=(2x+9)2g(x) = (2x + 9)^2:

    • Substitute x=3x = -3 into the function: g(3)=(2(3)+9)2=(6+9)2=(3)2=9g(-3) = (2(-3) + 9)^2 = (-6 + 9)^2 = (3)^2 = 9 So, g(3)=9g(-3) = 9.

Therefore, the correct answers are:

  • Option A: 9
  • Option C: 92

These are the values Patrick will calculate.

Would you like further details or have any questions? Here are some related questions:

  1. What is the result of f(x)=6+14xf(x) = -6 + 14x when x=0x = 0?
  2. How would the function g(x)g(x) change if xx were 2 instead of -3?
  3. How do the results change if the coefficient of xx in f(x)f(x) is increased by 2?
  4. What is the minimum value of g(x)=(2x+9)2g(x) = (2x + 9)^2?
  5. How do the graphs of these functions look in comparison to each other?

Tip: Always verify your calculations by substituting back into the original function to ensure accuracy.

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Math Problem Analysis

Mathematical Concepts

Functions
Substitution
Quadratic Functions

Formulas

Function evaluation formula

Theorems

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Suitable Grade Level

Grades 7-9