How do you make the fraction 7/20 as a decimal?

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

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.