Help ;-; this is probably easy as. f but not for me lol​

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Asequence has its first term equal to 4, and each term of the sequence is obtained by adding 2 to the previous term. if f(n) represents the nth term of the sequence, which of the following recursive functions best defines this sequence? (1 point) f(1) = 2 and f(n) = f(n − 1) + 4; n > 1 f(1) = 4 and f(n) = f(n − 1) + 2n; n > 1 f(1) = 2 and f(n) = f(n − 1) + 4n; n > 1 f(1) = 4 and f(n) = f(n − 1) + 2; n > 1 i will award !