Me i really needa turn this in by tmr

Consider the function represented by the equation 1/2 j + 1/4 k equals 3 which shows the equation written in function notation with j as the independent variable

What is the 12th term of b(n)=-4-2(n-1)

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.