Find 5g(x)-f(x) given f(x)=9x^2+7x and g(x)=2-x ^2 means there’s a 2 over top that number please show work

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Which shows how to solve the equation 3/4x=6 for x in one step?

The ideal weight of a nickel is 0.176 ounce. to check that there are 40 nickels in a roll, a bank weighs the roll and allows for an error of 0.015 ounce in total weight