b is between those two nu,ners
She drove 2 hours because when you divide 140 by 70 u get 2
Yes, you just times one of the equations by a numberr to make it cancel out with the other. For instance:
2x + 6 y = 10
4x + 2y = 16
If we multiply the equation 2x + 6 y = 10 by 2 we get the following
2x + 6 y = 10
-2(2x + 6 y) = -2(10)
-4x -12y = -20
Now we use this new equation.
-4x -12y = -20
4x + 2y = 16
As you can see, you can cancel out the x and solve for y now.

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Answer:
y = mx + b
Step-by-step explanation: