Untitled8586.notebook
September 09, 2016
warm up 9/9/2016
Solve the following systems using SUBSTITUTION!
2x ­ 2y = ­20
x ­ y = ­10
x ­ y = 5 2x ­ 2y = 14
*Check your solutions with your neighbor.
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Untitled8586.notebook
September 09, 2016
homework challenge
*Solve the following system of inequalities by graphing!
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Untitled8586.notebook
September 09, 2016
review
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Untitled8586.notebook
September 09, 2016
word problems
A grocery store has small bags of apples for $5 and large bags of apples for $8. If you buy 6 bags and spend $45, how many of each size did you buy?
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Untitled8586.notebook
September 09, 2016
word problems
You and your business partner are mailing advertising flyers to your customers. You address 6 flyers per minute and have already mailed 80. Your partner addresses 4 per minute and has already mailed 100. After how long will you and your partner have mailed the same number of flyers.
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Untitled8586.notebook
September 09, 2016
unit 1 3‐2 Continued
Elimination:
6x + y = ­2
4x ­ 3y = 17
Step 1: Make the coefficients of either x or y have the same number but opposite in sign.
*Do this by multiplying one or both equations by a number. Step 2: Add the equations together and solve. Step 3: Substitute your answer from step 2 into one of the equations and solve for the other variable. 6