1. y=3-x2. y=0,5x-23. y=2/7x-24. y=-3

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To find the x-intercepts (where y=0) for each of these equations, we can set y equal to 0 and solve for x.

y = 3 - x^2
0 = 3 - x^2
x^2 = 3
x = ±√3
x-intercepts: x = √3 and x = -√3

y = 0.5x - 2
0 = 0.5x - 2
0.5x = 2
x = 4
x-intercept: x = 4

y = 2/7x - 2
0 = 2/7x - 2
2 = 2/7x
x = 7
x-intercept: x = 7

y = -3
Since y is always -3, there are no x-intercepts for this equation.