(easy subtraction) Cassie wrote a story with 945 words. While she was revising her work, she erased 138 words. How many words does her story now have?

Can someone me with this problem . show your work .

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Wrote and expression for the difference of p and 4