If $f (x) = 4 x - 3$ , find the following value.
$\frac{f (9) + f (7)}{f (3) + 7} =$
Give answer as an integer or decimal rounded to nearest tenth.

Answer

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Answer

$3.6$

Steps

Step 1 ：Find the values of f(9), f(7), and f(3) using the given function f(x) = 4x - 3:

Step 2 ：f(9) = 4(9) - 3 = 33

Step 3 ：f(7) = 4(7) - 3 = 25

Step 4 ：f(3) = 4(3) - 3 = 9

Step 5 ：Plug these values into the given expression and simplify:

Step 6 ： $\frac{f (9) + f (7)}{f (3) + 7} = \frac{33 + 25}{9 + 7} = \frac{58}{16}$

Step 7 ：Simplify the fraction and round to the nearest tenth:

Step 8 ： $\frac{58}{16} = 3.625$

Step 9 ： $3.6$