Which of the equations listed below are linear equations?

1: c= 2pir
2: a= pir^2
3: v= 4/3pir^3

a equation 1 only
b equation 2 only
c equations 1 and 3

1.

Step-by-step explanation:

We know that a linear equation is a particular type of equation .

The given equations :

Here , variable = r (radius)

Since , the variable has exponent =1 , therefore it is a linear equation.

Here , variable = r (radius)

Since , the variable has exponent =2 , therefore it is not a linear equation.

Here , variable = r (radius)

Since , the variable has exponent =3 , therefore it is not a linear equation.

Hence , the correct answer is .

is there answer choices?

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b