Real Life Quadratics

Which inequality matches the situation:  A parking garage charges a $2.50 base fee plus an hourly rate of $4.00. If you have at most $12.50 to pay for parking, how long can you park?

• 2.50 + 4.00x < 12.50

• 2.50 - 4.00x > 12.50

• 2.50x + 4.00 < 12.50

• 2.50x - 4.00 < 12.50

Austin has $145 in his savings account. He earns $36 each week mowing lawns. If Austin saves all of his earnings, after how many weeks will he have $433 saved?

• 36x + 145 = 433

• 145x + 36 = 433

• 36x + 433 = 145

• 433x + 145 = 36

Jen wants to buy a new car for $18,500. She pays $2,500 at signing and wants to pay $250 per month. How many months until it is paid off?

• 18,500 + 2,500 = 250x

• 2,500 - 250x = 18,500

• 250x + 2,500 = 18,500

• 2,500 (250)x = 18,500

The graph below shows the height, in feet, over time, in seconds, of a student's rocket. Use the graph to answer the questions below. What was the maximum height the rocket reached?

• 25 feet

• 45 feet

• 65 feet

• 85 feet

• 22 meters

• 1.89 seconds

• 2 seconds

• 2 meters

• 18 meters

A ball is thrown vertically into the air. Its height in feet after t seconds is given by the equation h(t) = –5t² + 20t. How many feet into the air will the ball be at 3 seconds?

Mathematical Equivalence

OFF

• 0.4 seconds

• Frog's initial height

• 0.8 seconds

• Frog's time to reach maximum height

• 12 inches

• Frog's landing time

• 0 inches

• Frog's maximum height

• 24 feet

• 10 feet

• -4 feet

• 3 feet

• 3 seconds

• 46 seconds

• 5 seconds

• 10 seconds

• 24 feet

• 9 feet

• 46 feet

• 34 feet