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
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.
x = 7y - 30 and x = 3y + 10
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15
Solve:
(-2, 1)
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15
Solve:
(-3, 2)
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heart
Other team wins 15 points!
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shark
Other team loses 15 points!
Okay!
gift
Win 25 points!
Okay!
banana
Go to last place!
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15
Solve
no solution
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monster
Reset all scores!
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seesaw
Swap points!
Okay!
shark
Other team loses 20 points!
Okay!
lifesaver
Give 10 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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boom
Lose 50 points!
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fairy
Take points!
5
10
15
20
25
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
Name two methods of solving systems of two equations.