Yes. The original price of the dozen added to the price of berries (.5) multiplied by the amount(b) is the same equational representation to the right of the equal sign.
Answer: C.
is the missing statement.
Explanation: Given: ΔABC with m∠ABC = 90° (view diagram)
Prove: 
Proof: 1. Draw
(construction)
2.
(Angles with the same measure are congruent.)
3.
(Reflexive Property of Congruence)
4.
(AA criterion for similarity)
5. BC:DC=AC:BC (Corresponding sides of similar triangles are proportional.)
6.
(cross multiplication)----------(1)
7.
(Angles with the same measure are congruent)
8.
(Reflexive Property of Congruence)
9.
(AA criterion for similarity)
10. AB:AD=AC:AB⇒
--------------(2)
equation (1) + equation (2) ⇒
⇒
Let's find the derivative of that hyperbola in order to find a slope formula to help us with this equation. We already have an x and y value. The derivative is found this way:

so

. The derivative supplies us with the slope formula we need to write the equation. Sub in the x value of 3 to find what the slope is:

. So in our slope-intercept equation, x = 3, y = 1, and m = -1/3. Use these values to solve for b.

so b = 2. The equation, then, for the line tangent to that hyperbola at that given point is
First step is to do distributive property.
so you multiply 5 by -3.4k and -7
your equation now is -17k-35+(3k+21)
Then you add like terms
add -17k+3k to give you -14k-35+21
then you add like terms again
add -35+21 to give you -14
so now your equation is -14k-14
So that is your answer simplified