Which set is closed under subtraction?

The correct answer is rational numbers.

Step-by-step explanation:

We consider that a set is closed when the two elements that are part of an operation result in an element belonging to the same group.

As for rational numbers, they are all those that can be represented as the quotient of two whole numbers or, a whole and a positive natural.

These types of numbers are considered in a set closed under addition, subtraction, and multiplication.

Given this information we can say that the correct answer is rational numbers.

1: -2 3/4, -2 1/2, -14, 0, 3, 8 1/3

2: -4, -3, -2 1/2, -2 1/4, 3 1/4,

step-by-step explanation:

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b