Round to the nearest cent

$1.6845

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?