Answer: domain: {-2, -1, 0, 1}
range: {0, 1, 2, 3}
X^2-2=x
x^2-2+x=0
x^2+x-2=0
(x+2)(x-1)=0
Therefore, x+2=0 or x-1=0
Hence, x=-2 or x=1
Solutions= -2 or 1
X-7/5 = -2
x- 7 = -10
x = -3
The number is -3
189.9 miles= 305.614
..............................