Question 84935
Write using, symbols:  2. c decreased by 10
Decreased means subtract, -.
{{{highlight(c-10)}}}
I don't have your book, but there should be some kind of key word list to help you, like 
sum means +
times means *
That kind of thing.
If you learn what the key words mean, it will make these kinds of problems a lot more fun. 
Happy Calculating!!!