What is the value of `f\left(-4\right)?` the function is f(x) = 10 - 4x
3 answers
To find the value of \( f(-4) \) for the function \( f(x) = 10 - 4x \), we substitute \( -4 \) for \( x \) in the function:
\[ f(-4) = 10 - 4(-4) \]
Next, we calculate \( 4(-4) \):
\[ 4(-4) = -16 \]
Now substitute back into the equation:
\[ f(-4) = 10 + 16 \]
Finally, calculate the sum:
\[ f(-4) = 26 \]
Thus, the value of \( f(-4) \) is \( \boxed{26} \).
To find the value of \( f(5) \) for the function \( f(x) = -3 + 8x^2 \), we substitute \( 5 \) for \( x \) in the function:
\[ f(5) = -3 + 8(5^2) \]
First, calculate \( 5^2 \):
\[ 5^2 = 25 \]
Next, substitute that value back into the equation:
\[ f(5) = -3 + 8(25) \]
Now, calculate \( 8(25) \):
\[ 8(25) = 200 \]
Now, substitute this value back into the equation:
\[ f(5) = -3 + 200 \]
Finally, calculate the sum:
\[ f(5) = 197 \]
Thus, the value of \( f(5) \) is \( \boxed{197} \).
