What is 7/9 rounded to the nearest 1/2

Consider the function f(x)=-5x+3 what is f(-2)

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12