Meaning of letters in an algebraic formula

Aviation Mechanic General (AMG) practice question 16 of 25 on Mathematics. ACS element AM.I.H.K6 · difficulty: recall. Want to answer it in a timed quiz? Use the Aviation Mechanic General (AMG) practice mode.

Question bank updated 2026-09-22

QUESTIONIn the equation d = v × t (distance = velocity × time), the letters d, v and t are called

Aconstants
Bcoefficients
Cvariables

Show the answer and explanation

Correct answer: C. variables

A — incorrect Constants are fixed values such as π; d, v and t change from one problem to another.
B — incorrect A coefficient is a number multiplying a variable, such as the 3 in 3N; the letters themselves are the variables.
C — correct Algebra uses letters or symbols to represent variables; in d = v × t the variables are d, v and t.

BACKGROUND

Algebra is the branch of mathematics that uses letters or symbols to represent variables in formulas and equations. The handbook's example is d = v × t, where distance equals velocity times time, and the variables are d, v and t. Algebraic equations are frequently used in aviation to show the relationship between two or more variables, and they normally contain an equals sign. Another example is A = π × r², which relates the area of a circle to its radius.

STUDY TIP

When you see a formula, identify which symbols are variables (change with the problem) and which are constants (such as π).

KEY POINTS

Algebra uses letters to represent variables.
In d = v × t, the variables are d, v and t.
Equations show the relationship between variables.

SOURCES

FAA-H-8083-30B ch03 "Algebra"

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