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# Solving Systems of Equations - PowerPoint PPT Presentation

Solving Systems of Equations. By: Elizabeth F. December 18, 2003 2 nd Period. What's this all about?. Visual Arts/Communication Media Tech Radio Advertisement Pricing. The Problem.

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## PowerPoint Slideshow about 'Solving Systems of Equations' - malaya

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### Solving Systems of Equations

By: Elizabeth F.

December 18, 2003

2nd Period

• Visual Arts/Communication

• Media Tech

information,

now what do

I do with it?

Layne wants to purchase 3 radio ads that will air for 2 days. Radio Station A asks for \$25 per ad per day. Radio Station B costs \$30 for the first ad and \$15 for each ad following at the rate of \$12 a day.

How much does it cost to air 3 ads on Radio Station A for 2 days, compared to how much it costs to run the same ads on Radio Station B?

Total price for Radio Station A.

Number of days

Price of each day

Substitute and Solve Radio Station A.

• Layne wants to purchase 3 radio ads that will air for two days.

• 25a + 25d = t

25 (3) + 25(2) = t

75 + 50 = 125

The total for Radio Station A is \$125.

Total price for Radio Station B

Price per day

Number of days

Substitute & Solve more complicated.

Radio Station B costs \$30 for the first ad and \$15 for each ad following at the rate of \$12 a day.

30 + 15a +12d = t

30+15(2)+12(2)=t

30+30+24=84

The total cost for radio station B is \$84

Conclusion more complicated.

Layne should pick Radio Station B because, by solving systems of equations, the final cost comes out to \$84, compared to Radio station A, at \$125.