3x + 6y = -2......multiply by -5
15x + 30y = -10
--------------------
-15x - 30y = 10 (result of multiplying by -5)
15x + 30y = -10
--------------------add
0 = 0
there are infinitely many solutions
120 miles = 3 hrs
1 mile = 3/120 = 1/40
200 miles = 1/40 × 200
= 5 hrs
Answer:
none
Step-by-step explanation:
The answer should be 1/9y^4
-8y is the answer.
-9y+y=-8y
2-1+6-7=0