A rectangle has side lengths of 9x+12 and 3x+7. What is the perimeter

Answer:
B. 24x + 38
Step-by-step explanation:
Since this is a rectangle, there will be a pair of sides that are the same. With perimeter, add up the side lengths.
[tex]2(9x+12)+2(3x+7)\\\\18x+24+6x+14\\\\24x+38[/tex]