These words related to geometry that are quite hard to define precisely are called the point, the line and the plane. They are called as such, not because you can't necessarily define them.
So I have 2 answers here they are.
key: 1/3hours =20 min
221÷2=110.5÷20=5.525
221.5÷20=11.075
I hope this helps!
Do you mean 7 more than the product of 5 and a number? If so the answer is... y=7+5x
although none of these are right, C would make the most sense