Find the distance between the points B and B′ if ΔABC is reflected across line l followed by a reflection across line m. A.)10 units
B.)14 units
C.)7 units
D.)17 units

¿Consideras que la gente que discrimina por aspectos como el color de la piel, clase social, por el género, etc., no saben lo que las personas valen y por eso no las valoran?

14 units

Step-by-step explanation:

If l and m are two parallel lines and a point X is reflected across line l followed by a reflection across line m, then the distance between

X and X′ is 2d, where d is the distance between l and m. Since d = 7, the distance between B and B′′ is 2(7) = 14 units.

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