TWO QUESTIONS !! GEOMETRY

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. after tax the total is 45.99. what percentage of the subtotal is the total?

Below are two different functions, f(x) and g(x). what can be determined about their slopes? f(x)= −1x + 1 the function g(x) going through 0, 3 and 1, 1

There were 34 coins in a bag. jim took 15 coins out of the bag. rose put 17 coins into the bag. how many coins are now in the bag?