Answer:
It isn't necessary but having a positive coefficient for 
makes things like completing the square and factoring easier.
Answer:
Step-by-step explanation:
A
Answer:
B
Step-by-step explanation:
B is the only one that is actually a point on the graph
Let x = number of long sleeve shirts
Let y = number of short sleeve shirts
x + y = 200
x/2 + y/3 = 80
Now solve this pair of simultaneous equations to find x and y.
He will need 527.52 cubic centimeters of wax. You divide the diameter by 2 ten multiply that number by itself to get the circumference. From there you multiply it by 12 then by 4 and there's your answer
