Please help! Will mark brainliest!
Simplify.

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

If g^-1(x) is the inverse of g (x) which statement must be true