Which expression(s) represent a total gain of $70? Select all that apply 100 + (-30)
-20 + (-50)
20 + (50)
50 - (-20)
-30 - (-100)
-70
70

Which ones apply please help!

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

The volume of a cube is 8 in to the 3rd power. how long is each side?