Which of the following represents a constant from the expression given?

15x2 + 2x + 9

the number 9

Step-by-step explanation:

it is never being changed unlike the other terms because they are being directly multiplied by the variable x. but no matter what 9 stays the same.

since you can solve this using the Quadratic Formula, the answer would be 9.

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

nothjing

step-by-step explanation: