Give an example of a variable in Math terms

In algebra, terms are the values on which the mathematical operations take place in an expression. A term can be a constant or a variable or both in an expression. In the expression, 3a + 8, 3a and 8 are terms. Here is another example, in which 5x and 7 are terms that form the expression 5x + 7.

a variable is any unknown number represented by a letter.

Step-by-step explanation:

AB ≈ 21.8

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan52° = = =

Multiply both sides by 17

17 × tan52° = AB, thus

AB ≈ 21.8 ( to the nearest tenth )