The reciprocal of a number x is 1/x.
Let x = 1000
The reciprocal is 1/1000.
The first sentence → x - 2y = -1
the second one → 3x - 2y = -3
multiply the first one by -1
you can get → -x + 2y = 1
plus two sentences together
you can get → 2x = -2
so you are able to know that x = -1
and y = 0
2. y=x-3
3. y=3x+1
4. y=-3x-3
B. 0.6 seconds
Because they want you to round to the nearest 10th and 0 is the ground.
