Can you please answer

Nine more than four times a number is the same as one less than twice the number. find the number?

If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0

What is 6/10 rounded to the nearest half