What is the area please help

What should be done to solve the equation? x+14=21 add 14 to both sides of the equation. subtract 14 from the left side of the equation. add 14 to the left side and subtract 14 from the right side of the equation. subtract 14 from both sides of the equation.

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

What is the size of the matrix resulting from