Question

Which of the following is a linear expression in one variable? x+2+y y+z+3 4 1+z

Answer 1

Answer:

1+z

Step-by-step explanation:

a variable is basically a letter replacing a number.

a linear equation in one variable is an expression with only one letter.

so in each expression you have to count the amount of variables

so in

a) x+2+y

there are two variables in this equation:

x and y

b) y+z+3

there are also two variables in this equation:

y and z

c) 4

there are no variables in this equation

d) 1+z (correct answer)

there is one variable in this equation:

z

therefore d is correct.

hope you understand.