The answer is B.)
The answers are using the distributive property. The distributive property multiplies both the numbers inside the parenthesis by the number that's on the outside of the parenthesis.
6x3 = 18, 6x4x=24x.
Hope this helps :) work hard!
First one C second one D sorry if I’m wrong
The triangle angle sum theorem states that the 3 angles in the triangle must equal 180 degrees.