Yesterday the temperature at noon was 11.4°F. By Midnight, the temperature had decreased by 15.7 degrees. What was the temperature at midnight?

3.4a=57.8 what is the the value of a

Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?

If it 8 inch candle burns at 7/10 inch per hour and a 6 inch candle burns at 1/5 inch per hour after how many hours would both candles be the same height