Which statement about perfect cubes is true?
25 is a perfect cube because 25 = 5+5+5+5+5
30 is a perfect cube because 30 = 3.10
512 is a perfect cube because 512= 8.3.8
1,875 is a perfect cube because 1,875 = 25.25.3

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

Which is f(5) for the function –2x2 + 2x - 3?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /