If f(x) = 2x+1, what would the function look like once you substitute in a 1 to find f(1)?

If I know that f(2) = 4, what is another way I can write my answer?

Let

If  $g\left(x\right)=\frac{4}{3}x+\frac{7}{9}$  what is the value of  $g\left(3\right)$  ?

If $f\left(x\right)=16\left(3x-9\right)$  evaluate  $f\left(6\right)$   

If  $g\left(x\right)=7\left(4-2x\right)+5$  
evaluate  $g\left(11\right)$ .

If  $h\left(x\right)=7-8\left(4x-19\right)$  
evaluate  $h\left(6\right)$  

The mathematical model C(x) = 400x + 70,000 represents the cost in dollars a company has in manufacturing x items during a month. Based on this, how much does it cost to produce 100 items?

Suppose the sales of a particular brand of appliance are modeled by the linear function S(x) = 220x + 2700, where S(x) represents the number of sales in year x, with x = 0 corresponding to 1982. Find the number of sales in 1992.