Pls! you!
1) in the morning, the temperature was -4.6 f. by the afternoon, the temperature was -9.4 f. what was the change in temperature
2) ron made withdrawals of $46.79 and $18.93 from his checking account. he also deposited $30. if his balance before these transactions was $71.24, what is his balance now?
explanation pls!

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.