Answer:
2c+10
Step-by-step explanation:
Answer: 
Step-by-step explanation:
For this exercise it is important to remember that:
1. The word "difference" indicates subtraction (The result of a subtraction is called "difference").
2. The multiplication of signs:

For this case, according to the data given in the exercise, the records high temperature and the record low temperature are:

Therefore, if you want to find the difference in the record temperatures, you need to sutract them.
Then you get the following result:
You can solve by subtracting: 500-330
but I like to use mental math and think this way:
she has 330
70 more will give her 400
and 100 more will give her 500
100 + 70 is 170.
Graph 1 which is shown in the image below
Just divide 5/4 = 1.25. Thank you.