4x -2(3x+7)
Use the distributive property:
4x - 6x -14
Combine like terms:
-2x - 14
Starting on the right, multiply each digit in the top number by each digit in the bottom number, just as with whole numbers
There are total 10 right angles in the given diagram, hence option (b) is correct match.
<em>Refer the attached image for clarification. </em>

Answer:
Step-by-step explanation: