Modeling with Systems of Linear Equations Answers

Enrique has $50 in his lunch account and spends $5 per day from the account. Maya has $46 in her lunch account and spends $4 per day from the account. Which equations model the situation?50 – 5x = y and 46 – 4x = y5x + 50 = y and 4x + 46 = y5x – 50 = y and 4x – 46 = y5 – 50x = y and 4 – 46x = y

The average wind speed was [___] miles per hour.

⇒ 170

$[___]

Dalia flies an ultralight plane with a tailwind to a nearby town in 1/3 of an hour. On the return trip, she travels the same distance in 3/5 of an hour. What is the average rate of speed of the wind and the average rate of speed of the plane? Initial trip: Return trip:

Which equation represents the cost of the high-efficiency washing machine over a given number of years? [___]

Which equation represents the cost of the standard washing machine over a given number of years? [___]

After how many years of use would the washing machines cost the same amount? [___]

Which washing machine would be the more practical purchase if kept for 9 years? [___]