B and C cant be it because its not a whole number and it is .4 so it cant go up one making D the only possible choice.
<u>Answer:</u>

<u>Step-by-step explanation:</u>
We are given the following two points and we are to find the slope of the line which passes through these points:
and 
The formula of the slope is given by:
Slope = 
Substituting the given coordinates in the above formula:
Slope = 
Answer:
Step-by-step explanation:
In order to find the value of y, first we need to find the length of the perpendicular dropped from one of the vertices of the triangle to its opposite side.
By geometric mean theorem:
Length of the perpendicular
Next, by Pythagoras theorem:

$4.47 is the required cost.
Their could be 14 people who order the deluxe and 18 people who get regular meals