systems of inequalities jeopardy
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Systems of inequalities Jeopardy. By Myia , Erin, and Maddy. Category 1. Category 2. Category 3. 200. 200. 200. 300. 300. 300. 400. 400. 400. Category 1 200 Points. What is the value of Y in the equation when X =0 YTRANSCRIPT
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SYSTEMS OF INEQUALITIESJEOPARDY By Myia, Erin, and Maddy
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200200
Category 1
300
Category 2
400
200
400
300300
400
Category 3
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CATEGORY 1200 POINTS
What is the value of Y in the equation when X =0
Y<X+6
Answer
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Y<6
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Answer
Category 1300 Points
What is the Y value of Y>6X-5 when X=2
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Category 1300 points
Y>7
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CATEGORY 1400 POINTS
Answer
What is the value of Y in the Equation Y>X15+-5 when X=10
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Category 1400 Points
Y>145
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CATEGORY 2200 POINTS
Answer
Solve the system by graphing it
2x – 3y < 12 x + 5y < 20 x > 0
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Category 2200 Points
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CATEGORY 2300 POINTS
Answer
Solve the system by graphing it
2x – y > –3 4x + y < 5
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Category 2300 points
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CATEGORY 2400 POINTS
Answer
Solve the system by graphing itx – y < –2 x – y > 2
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Category 2400 Points
No Solution
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CATEGORY 3200 POINTS
Answer
A calculator company produces a scientific calculator and a graphing calculator. Long-term projections indicate an expected demand of at least 100 scientific and 80 graphing calculators each day. Because of limitations on production capacity, no more than 200 scientific and 170 graphing calculators can be made daily. To satisfy a shipping contract, a total of at least 200 calculators much be shipped each day.
If each scientific calculator sold results in a $2 loss, but each graphing calculator produces a $5 profit, how many of each type should be made daily to maximize net profits?
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Category 3200 points
x: number of scientific calculators producedy: number of graphing calculators produced
Y=170X=200X=100Y=80Y=-X+200
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CATEGORY 3300 POINTS
Answer
You have $12,000 to invest, and three different funds from which to choose. The municipal bond fund has a 7% return, the local bank's CDs have an 8% return, and the high-risk account has an expected (hoped-for) 12% return. To minimize risk, you decide not to invest any more than $2,000 in the high-risk account. For tax reasons, you need to invest at least three times as much in the municipal bonds as in the bank CDs. Assuming the year-end yields are as expected, what are the optimal investment amounts?
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Category 3300 Points
x: amount (in thousands) invested in bondsy: amount (in thousands) invested in CDs
Maximize Y = 1.44 – 0.05x – 0.04y, subject to: x > 0 y > 0 y > –x + 10 y < –x + 12 y < ( 1/3 )x
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ExplanationSince the question is asking to find the amount of money for each account, the variables will need to stand for those amounts. Since its easier to deal with smaller numbers, count by thousandsx: amount (in thousands) invested in bondsy: amount (in thousands) invested in CDs only have two variables, but have three accounts. To handle this, they need the “How much is left" construction:12 – x – y: amount (in thousands) invested in the high-risk accountcan't invest negative amounts of money, so the first two constraints are the usual ones: x > 0and y > 0. The amount in the high-risk account can't be negative either, so 12 – x – y > 0, which simplifies as:y < –x + 12The upper limit on the high-risk account gives the inequality (12 – x – y) < 2. This simplifies as: y > –x + 10And the tax requirements give y < ( 1/3 )x. The optimization equation will be the total investment yield, Y = 0.07x + 0.08y + 0.12(12 – x – y) = 1.44 – 0.05x – 0.04y.
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CATEGORY 3400 POINTS
Answer
The "We Sell CDs" website plans to purchase ads in a local newspaper advertising their site. Their operating budget will allow them to spend at most $2200 on this advertising adventure. They plan to run at most 20 ads. An ad will cost $50 to appear in the weekday paper and $200 to appear in a weekend edition. Prepare a graph that will represent all of the possible combinations of ads under these conditions
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Category 3400 Points
x + y < 20 (there will be at most 20 ads)200x + 50y < 2200 (the cost of the ads at most $2200)