Aline passes through the points (7, 10) and (7, 20). which statement is true about the line? a. it has a slope of zero because in the formula is zero, and the numerator of a fraction cannot be zero. b. it has a slope of zero because in the formula is zero, and the denominator of a fraction cannot be zero. c. it has no slope because in the formula is zero, and the numerator of a fraction cannot be zero. d. t has no slope becausein the formula is zero, and the denominator of a fraction cannot be zero.

slope = (20 - 10)/(7 - 7) = 10 / 0 (cannot divided by 0)

Answer is d.

d. it has no slope because in the formula is zero, and the denominator of a fraction cannot be zero.

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