Ch 3 Test Review

Match

• y > -5x - 1/2   and  y ≥ -1/2x - 4
• y > -1/5x - 1/2  and  y ≤ -2x - 4
• y ≥ -5x - 1/2   and  y ≤ -1/2x - 4
• y < -1/5x - 1/2   and  y ≥ -2x - 4

Solve for x and y
3x + 2y = 16
7x + y = 19

• (-2,5)
• (-2,-5)
• (2,-5)
• (2,5)

Bill and Steve decide to spend the afternoon at an amusement park enjoying their favorite activities, the water slide and the gigantic Ferris wheel.  Their tickets are stamped each time they slide or ride.  At the end of the afternoon they have the following tickets:
Fun Time Amusements
Water Slide:  X X X 
Ferris Wheel: X X X 
Total:  $17.70
Bill's Ticket  
Fun Time Amusements
Water Slide: X X
Ferris Wheel: X X X 
Total:  $15.55
 Steve's Ticket
How much does it cost to ride the Ferris Wheel?
How much does it cost to slide on the Water Slide?

• Ferris Wheel:  $3.25
  Water Slide:  $4.25
• Ferris Wheel: $3.75
  Water Slide:  $2.15
• Ferris Wheel:  $ 4.25
  Water Slide:  $2.25
• Ferris Wheel:  $2.75
  Water Slide:  $5.25

A farmer has asked you for advice on the best strategy for planting wheat and corn on her 500-acre farm. To make it through harvest time, each acre of wheat she plants will require 1 person-day of labor and other expenses of $20. Each acre of corn she plants will require 5 person-days of labor and expenses of $30. The farmer has $11,400 and 1480 person-days of labor available, and she expects to make a profit of $90 per acre of wheat and $120 per acre of corn. What is the maximum profit?

• $47,400
• $49,200
• $51,000
• $52,300

Solve:
-4x - 5y - z = 18
-2x - 5y - 2z = 12
-2x + 5y + 2z = 4

• (4, 0, -2)
• (-4, 0, -2)
• Many Solutions
• I did not get any of the answers above so I am assuming none of the above.