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. Representย this
problem as linear equations in two variables.
x = 7y - 30 and x = 3y + 10
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15
Solve
no solution
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Name two methods of solving systems of two equations.
Substitution, Elimination.
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Solve
infinitely many solutions
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Solve:
(4, 1)
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lifesaver
Give 25 points!
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rocket
Go to first place!
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fairy
Take points!
5
10
15
20
25
baam
Lose 20 points!
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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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Solve:
infinitely many solutions
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Solve:
(-2, 1)
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Solve:
(-5, 1)
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Solve:
No solution
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15
Find two numbers whose sum is 28 and difference is 2