Which of the following situations cannot be modeled with the equation 5x – 15y = 335?
A.
Randy earns $5 for each hour he works at his job, and spends $15 each time he goes out to dinner. He has $335 at the end of the week.
B.
A hamburger sells for $5 but costs $0.15 to make, giving a net income of $3.35.
C.
Ruby is paid for the 5 sales she made but docked for the 15 sales she missed for a net income of $335.
D.
Tommy earned points for 5 correct answers on a standardized test, but was docked for 15 incorrect answers for a point total of 335.

Question

Which of the following situations cannot be modeled with the equation 5x – 15y = 335?
A.
Randy earns $5 for each hour he works at his job, and spends $15 each time he goes out to dinner.  He has $335 at the end of the week.
B.
A hamburger sells for $5 but costs $0.15 to make, giving a net income of $3.35.
C.
Ruby is paid for the 5 sales she made but docked for the 15 sales she missed for a net income of $335.
D.
Tommy earned points for 5 correct answers on a standardized test, but was docked for 15 incorrect answers for a point total of 335.

nurali · Answer

i think A.
Randy earns $5 for each hour he works at his job, and spends $15 each time he goes out to dinner.  He has $335 at the end of the week.

anonymous · Answer

The situation B cannot be modeled with the equation. Can anyone tell me if this is actually a trap?

texaschic101 · Answer

A can be modeled (x = hrs worked, y = times he went out to dinner)
B cannot be modeled
C can be modeled (x = how much she gets paid per sale,y = how much she gets docked per sale)
D can be modeled (x = points for each correct answer, y = how much he gets docked for each incorrect answer)