Page 182 - Math Course 2 (Book 1)
P. 182
Systems of Equations
Solve a System of Equations
Alex and Amber are both saving money for a summer
vacation. Alex has already saved $100 and plans to
save $25 per week until the trip. Amber has $75 and
plans to save $30 per week. In how many weeks will
Alex and Amber have the same amount of money?
A. 225 weeks
B. 7 weeks
C. 5 weeks
D. 20 weeks
Answer
Use the graph at the right to determine whether each
Skill Practice! system has no solution, one solution, or inf nitely many
solutions.
1. y = x – 1 2. x – y = –4
y = –x + 1 y = x + 4
3. y = x + 4 4. y = 2x – 3
2x – 2y = 2 2x – 2y = 2
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