Solve the System
One, None, or Infinite?
Real-world Riddles
Graph It
Special Cases and Parameters
400

y = 2x + 1 and 3x + y = 16

What is (3, 7)?

400

x + y = 8 and 2x + 2y = 16

 What are infinitely many solutions (same line)?

400

Scooters $7/day, bikes $10/day. 13 vehicles rented for $109 total. How many of each?

What are 9 scooters and 4 bikes?

400

y = x + 5 and y = –3x + 11

 What is (2, 7)?

400

he solution is (8, 3). The equations are y = mx + 1 and y = qx – 5. Find m and q.

What are m = 0.25 and q = 1?

800

x + y = 14 and 2x – y = 4

 What is (6, 8)?

800

 4x – 2y = 10 and 6x – 3y = 15

 What are infinitely many solutions (same line)?

800

The sum of two numbers is 37. Their difference is 9. What are the numbers?

What is 23 and 14?

800

 x + y = 13 and x – y = 3

 What is (8, 5)?

800

The solution is (3, 11). The equations are y = mx + 2 and y = qx – 4. Find m and q.

What are m = 3 and q = 5?

1200

3x + 2y = 22 and x + 4y = 14

 What is (6, 2)?

1200

x + 2y = 9 and 2x + 4y = 20

 What is no solution (parallel lines)?

1200

3 adult + 5 child tickets = $68. 5 adult + 3 child tickets = $68. Price of each?

What is an adult $12 and child $8?

1200

y = 4x – 7 and x + y = 8

 What is (3, 5)?

1200

ntersecting lines: x = 3y + 4 and x + y = 130

What is x = 100 and y = 30?

1600

5x – 2y = 11 and 3x + y = 19

What is (5, 7)?

1600

y = 3x – 4 and 6x – 2y = 8

What are infinitely many solutions (same line)?

1600

300 people at an event (adults & children). Adult tickets $20, child $12, total sales $4,800. How many adults and children?

What is 180 adults and 120 children?

1600

y = 2x and y = 12 – 2x

 What is (3, 6)?

1600

ntersecting lines: x = y + 15 and x + y = 165

What is x = 90 and y = 75?

2000

4x + 3y = 27 and 2x + y = 11

 What is (3, 6)?

2000

3x + y = 12 and 3x + y = 15

 What is no solution (parallel lines)?

2000

A store sold 10 shirts and pants for $355. Shirts $28 each, pants $41 each. How many of each?

What is 5 shirts and 5 pants?

2000

 3x + y = 15 and x – y = 3

 What is (6, 3)?

2000

Scooters $8/day, bikes $12/day. 15 total rentals made $156. How many scooters and bikes?

What are 9 scooters and 6 bikes?