May i please get help:))

The trigonometric ratios sine and secant are reciprocals of each other

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?