Chapter 3: Q50. (page 127)

Find each value if $f (x) = 4 x + 3$ and $g (x) = 5 x - 7$ .
$50 . g (- 1)$

Short Answer

Expert verified

The value of the expression $g (- 1)$ is $- 12$ .

Step by step solution

Step-1 – Apply the concept of evaluating a function

To evaluate the function, take the original function, substitute the value in place of variable and simplify the expression.

Step-2 –Evaluate the expression.

Consider the expression $g (x) = 5 x - 7$ .

The objective is to find the value of $g (- 1)$ .

Substitute x as $- 1$ in the function $g (x) = 5 x - 7$

$g (- 1) = 5 (- 1) - 7$

Step-3 – Simplify the expression

Multiply the terms on the right hand side and compute the value.

$\begin{array}{l} g (- 1) = 5 (- 1) - 7 \\ = - 5 - 7 \\ = - 12 \end{array}$

Hence, the value of the expression $g (x) = 5 x - 7$ when $x = - 1$ is $- 12$ .

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Find each value if $f (x) = 4 x + 3$ and $g (x) = 5 x - 7$ .
$50 . g (- 1)$

Short Answer

Step by step solution

Step-1 – Apply the concept of evaluating a function

Step-2 –Evaluate the expression.

Step-3 – Simplify the expression

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Find each value iffx=4x+3 and gx=5x-7 .50.g-1

Short Answer

Step by step solution

Step-1 – Apply the concept of evaluating a function

Step-2 –Evaluate the expression.

Step-3 – Simplify the expression

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Logic and Functions

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Study anywhere. Anytime. Across all devices.

Find each value if $f (x) = 4 x + 3$ and $g (x) = 5 x - 7$ .
$50 . g (- 1)$