Please help with Portfolio. There are answers here but not enough info. Rachel is placing playing cards on a table by following this steps.

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

10 points? ? +++ me asap 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.

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122