What part of a dictionary entry is commonly presented in italics?

Steve is scuba diving near his home in maui. at one point he is 100 feet below the surface. represent this number with a negative number. if he descends another 5 feet, what negative number will represents his.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?