1. In each expression below, identify the coefficient, constant, and variable. a. 7x + 9
b. 6y - 5
c. 4.5 - 2.72

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

step-by-step explanation: