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brookester6
1. y = x + 6 y = 2x (1 point) (6, 12) (–12, –6) (–6, –12) (2, 4) 2. 3x + 2y = 7 –3x + 11 = y (1 point) (6, –3) (6, –7) (5, –4) 3. 2x – y = –7 4x – y = –4 (–1.5, 4) (1.5, 10) (4, –1.5) (–1.5, –2) For questions 4–5, how many solutions does the system have? 4. –4y + 4 = x 2x + 8y = 8 one solution two solutions infinitely many solutions no solution 5. 6x + 2 = y 3y – 18x = 12 one solution two solutions infinitely many solutions no solution
For questions 1–3, what is the solution of the system? Use substitution. For questions 4–5, how many solutions does the system have?
for 1-3, substitute y=2x into first equation. 2x=x+6 2x-x=6 x=6 substitute x=6 into 2nd equation y=2x y=2*6 =12 (6.12)