Answer/Step-by-step explanation:
Coefficient is a number in a term that multiplies a variable in an expression.
A constant is a number in an expression that stands alone.
Variable are represented with letters in an expression of equation. They can stand alone or be multiplied with a coefficient.
a. In 7x + 9,
7 is the coefficient,
9 is the constant
x is the variable
b. In 6y - 5,
6 is the coefficient,
-5 is the constant
y is the variable
c. In 4.5 - 2.7z,
- 2.7 is the coefficient,
4.5 is the constant
z is the variable
