What is the equation of the circle in general form?

a. x² + y² + 2x + 8y − 47 = 0

b. x²+y² − 2x − 8y + 9 = 0

c. x² + y² + 2x + 8y + 9 = 0

d. x² + y² − 2x − 8y − 47 = 0

explain your answer, you ^-^

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

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