Brainliest to whoever gives me the right answer first pls help

which of the following is not a polynomial identity?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

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

Someone answer this asap for gabriella uses the current exchange rate to write the function, h(x), where x is the number of u. s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a. gabriella averages 7.5 u. s. dollars for every 100 euros. b. gabriella averages 100 u. s. dollars for every 25 euros. c. gabriella can exchange 75 u. s. dollars for 100 euros. d. gabriella can exchange 100 u. s. dollars for 75 euros.