Modeling with Systems of Linear Equations

Question 1

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

Revolt · Accepted Answer

50 – 5x = y and 46 – 4x = y

Question 2

[___] units

Revolt · Accepted Answer

300

Question 3

$[___]

Revolt · Accepted Answer

3

Question 4

Dalia had an average airspeed of [___] miles per hour.

Revolt · Accepted Answer

75867; 75868; 500

Question 5

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

Revolt · Accepted Answer

y = 50x + 500

Question 6

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

Revolt · Accepted Answer

y = 60x + 400

Question 7

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

Revolt · Accepted Answer

10

Question 8

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

Revolt · Accepted Answer

standard machine

Modeling with Systems of Linear Equations Answers

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