Answer:
Step-by-step explanation:
we have
----> First equation
----> Second equation
we know that
To subtract the 2nd equation from the first, negate all three of the second equation terms: 3x-4y=-5
and then adds this result with the first equation
1. is -6b+4 2. is n= -6
6
300t = 350(t-1)
300t = 350t-350
-50t=-350
t = -350 /-50
t = 7 hours
(x)²+(y)²=0