Answer:
Andy went as furthest as possible with a gallon of gasoline
Step-by-step explanation:
Let
m ----> the distance in miles
g ----> the number of gallons of gas
step 1
<u><em>Kelley's Mileage</em></u>
Find the slope of the linear function of Kelley's Mileage
we have the points
(0,0) and (20,50)

the linear equation is

step 2
<u><em>Andy's Mileage</em></u>
Find the slope of the linear function of Andy's Mileage
we have the points
(15,78.75) and (30,157.5)

the linear equation is

step 3
Rick's Mileage
we have

therefore
the slope is 
step 4
Compare the slopes

therefore
Andy went as furthest as possible with a gallon of gasoline
Answer:
I'm sorry it does not make sense but I can tell you it is either A or D
2 times 7 = 14
since each of the 7 guests received 2 tacos
You can use the Ruffini's rule. The answer using this method is,

And you can see that the multiplicity of the zero x=-4 is 2, and the multiplicity of the zero x=+3 is 1.