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Laabri

Chapter 9 Closure

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Last updated almost 5 years ago
25 Nsɛmmisa
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Factor these expressions completely, if possible. If you can't factor, write "not possible."

You are not finding the x-intercepts

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Solve each inequality below for the given variable. (Remember to flip the sign if necessary)

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Solve each quadratic equation using the specified method. (Find the x-intercepts rounded to the nearest hundreth if necessary)

When writing your answers, seperate the two x-ints with a comma

for example: 4, -5

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Answer the following questions given the quadratic function :

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The cost to rent a DVD has decreased 10% per year over the past several years.

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1.

Multiply (2x+3)(x-5)

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2.

What is the inequality shown on the graph ?

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3.

Is the point (0,4) a solution to the system of inequalities below?  Justify your answer.

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4.

Factor

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5.

Factor

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6.

Factor

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7.

Factor

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8.

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9.

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10.

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11.

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12.

Brian was holding a ballroom dance.  He wanted to make sure girls would come, so he charged boys $5 to get in but girls only $3.  The 45 people who came paid a total of $175.  ____________girls came to the dance.

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16.

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17.

What is the vertex?

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18.

What is the x -intercepts?

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19.

Sketch a graph of the function.

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20.

Graph the system of inequalities below on graph paper.

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21.

Lew says to his granddaughter Audrey, “Even if you tripled your age and added 9, you still wouldn’t be as old as I am.”  Lew is 60 years old.  Write and solve an inequality to determine the possible ages Audrey could be.

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22.

If the current cost is $5, write an exponential equation describing this situation.

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23.

According to the equation, what did it cost to rent a DVD 5 years ago?

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24.

The hare leaps 500 centimeters every 20 seconds.  The tortoise crawls 250 centimeters every 50 seconds, but gets a 1000-centimeter head start.  Use any method you know to determine how long it takes the hare to catch up to the tortoise. The hare catches the tortoise in __________seconds.

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25.

Find the equation of an exponential function of the form y=ab^x that passes through the points (3,13.5) and (5,30.375).