given $f(x)=10 - 2x$, find $f(7)$. \n-4\n3\n7\n56

Explanation:

Step1: Substitute x = 7 into the function

$f(7)=10 - 2\times7$

Step2: Perform multiplication

$10-2\times7=10 - 14$

Step3: Perform subtraction

$10 - 14=-4$

Answer:

A. -4