Diameter is 18
radius is half of diameter so 9
area is radius*pi ^2 which is 88.83
circumference is diameter * pi so 18*pi = 56.55
He should be able to travel 322 miles. It would cost him $33.235 rounded up to $33.24.
The correct answer is is D) If the group sells 15 prints they will loose $85.
To figure out which statement is true, we have to evaluate the function ,
for all the values given in options (A)-(D). A negative output represents a loss and a positive output will represent a profit.
In A 
so 
. In this case we gather that if they sell 12 prints, they will make a loss of $136. This tells us that option A is wrong.
In B, 
so 
. In this case we gather that if they sell 28 prints, they make a profit of $136. This tells us that option B is wrong.
In C, 
so 
. In this case we gather that if they sell 35 prints, they make a profit of $225. This tells us that option C is wrong.
Lastly, 
so 
. In this case we gather that if they sell 28 prints, they make a loss of 85 dollars. From this we gather that D is the correct option.
Depends are you finding x or other variables
Solve a simpler problem
make a table
make a drawing
use a graph
use guess-and-check
solve an equation
