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

   Reflected about y axis and vertically up by 4 .

Step-by-step explanation:

f(x) = x

for -f(x) it becomes  -f(x) = -x (1)   [ multiplying by -1 both sides ]

to find -f(x) +4  ,we add 4 both sides of equation (1)   ,we get

-f(x) +4 = -x +4 (2)

therefore  on applying two transformation  [ first reflection about Y axis and translated 4 units upwards makes the function -x+4

30.5*10=350$

you have to multiply the number without the decimal point then add it later but if its tenn u must move the place value of the decimal point 1 to the right.