The question i need on is 15.5z= -77.5 . i really don't get it : )

Witch represents the inverse of the function f(x)=1/4x-12

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

Astore ordered 750 candles a total wholesale cost of $7910.20. the soy candles cosy $12.17 each and thespecialty candles cost $9.58each. how many of each were bought?