Question

what is a coefficient

Answer 1

a number or quantity placed (generally) before and multiplying another quantity, as 3 in the expression 3x.

Answer 2

you can pretty easily look this up on wikipedia or google. do you have more context or information about the question?

Answer 3

Thank you to both

Answer 4

1.
numerical part of algebraic term: the number placed before a letter that represents a variable in algebra, e.g. the "3" of "3x" in the equation "3x = 6"
2.
figure measuring property of substance: a numerical constant that is a measure of a property of a substance