Question
Functions Practice
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Question
Find the output of the function y=−3x−7
when the input is −5
.
Answers
GPT-4o mini
To find the output of the function \( y = -3x - 7 \) when the input \( x \) is \( -5 \), we can substitute \( -5 \) for \( x \) in the function.
\[
y = -3(-5) - 7
\]
Now, calculate it step by step:
1. First, calculate \( -3 \times -5 \):
\[
-3 \times -5 = 15
\]
2. Now, substitute this value back into the function:
\[
y = 15 - 7
\]
3. Finally, calculate \( 15 - 7 \):
\[
y = 8
\]
Therefore, the output of the function when the input is \( -5 \) is \( 8 \).
\[
y = -3(-5) - 7
\]
Now, calculate it step by step:
1. First, calculate \( -3 \times -5 \):
\[
-3 \times -5 = 15
\]
2. Now, substitute this value back into the function:
\[
y = 15 - 7
\]
3. Finally, calculate \( 15 - 7 \):
\[
y = 8
\]
Therefore, the output of the function when the input is \( -5 \) is \( 8 \).