Your friend solved the equation 4x+12x-6-4(4x-7) and got x=34. WHat error did your friend make? What is the correct equation?

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.

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?