Calculate the following values.

1. If $y = 2 + 4.3x$, what is the value of $y$ when $x = −6$?

   Step 1(a):

   Substitute −6 in for x.
   y = 2 + 4.3( −6 )

   Step 2 (a):

   Multiply and simplify.

   y = 2 + (−25.8)

   Answer (a):

   y = −23.8

2. If $g(x)=(x−3)^2$, what is the value of $g(−9)$?

   Hint (b):

   Follow the steps in part (a).

   More Help (b):

   Remember to use the correct order of operations.

3. If $C(x)=x−2$, what is the value of $x$ when $C(x)=3.5$?

   Hint (c):

   Begin by substituting $3.5$ for $x$ in the equation.

4. If $y = 5x^{2} − 4$, what is the value of $y$ when $x = −2$?

   Hint (d):

   Rewrite the equation as $y=5(−2)^2−4$.

   Answer (d):

   $16$