That would be 1 21/99 or 120/99 as an improper fraction.
Normally it is x ininput and f(x)=y
solve for y and replace y with f(x)
minus 5x from both sides
2y=10-5x
divide both sides by 2
y=5-2.5x
f(x)=5-2.5x
Bill has 50 pennies in his drawer he finds 4 more pennies on the floor and his brother gives him x times the amount of pennies he has.
It’s true. All scientific notation is a # x 10^n
(A number multiplied by 10 to the power of any whole number integer n)