**Complete the recursive formula of the arithmetic sequence $-15, -11, -7, -3,...$.**
$c(1)=$ [[☃ math-keypad 1]]
$c(n)=c(n-1)+$ [[☃ math-keypad 2]]
Learn To Be brings free online tutoring students around the United States. Volunteer and gain community service hours while helping students who need it./p>