Phuong is checking the shipment, in which there are boxes of laser printers which cost $700 each and color monitors which cost $200 each. She sees that there are 30 boxes, and the order totals $15 000. Write a system of two equations.
x + y = 30 and 700x + 200y = 15 000
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15
Name two methods of solving systems of two equations.
Substitution, Elimination.
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trap
No points!
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magnet
Take 25 points!
Okay!
fairy
Take points!
5
10
15
20
25
thief
Give points!
5
10
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20
25
15
Solve:
(0, -3)
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15
Solve:
No solution
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monster
Reset all scores!
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magnet
Take 20 points!
Okay!
fairy
Take points!
5
10
15
20
25
banana
Go to last place!
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15
Solve:
(4, 1)
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heart
Other team wins 5 points!
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star
Double points!
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fairy
Take points!
5
10
15
20
25
banana
Go to last place!
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15
Solve
no solution
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15
Solve:
(-2, 1)
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lifesaver
Give 5 points!
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gold
Win 50 points!
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rocket
Go to first place!
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baam
Lose 20 points!
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15
Solve:
infinitely many solutions
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15
Find two numbers whose sum is 28 and difference is 2
13 and 15
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15
Solve:
(-3, 2)
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15
Solve
infinitely many solutions
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15
Five years ago, the age of Niraj was seven times that of his son Girish. Five years from, his age will be three times that of his son. Represent this
problem as linear equations in two variables.
