16 / 12 = 1.3333
Answer: she mowed 1 1/3 lawns per hour.
Answer:
It means that above 0 degrees Celsius the water does not freeze, whereas 0 degrees are freezing teperatures of water.
Step-by-step explanation:
Water freezes at 0 degrees Celsius, but the freezing temperature can be lowered by adding salt to the water. A student discovered that adding half a cup of salt to a gallon of water lowers its freezing temperature by 7 degrees Celsius. What is the freezing temperature of the gallon of salt water?
0° - 7° = -7°
Answer:
let the price of a pen be x
9 pens cost 7.20, so 9x costs 7.20. Therefore,
9x = 7.20
x = 0.8
Each pen is 0.8 dollars (80 cents).
