12+12+12+12= the perimeter as it is an square.
12x12= the area of the square as LxB is the area
Step-by-step explanation:
9. 6x + 14
10. 5x + 12
11. 15x + 12y
12. -16f + 27
13. 39n + 24
I think the answer is 245.14
$8 x 3 = $24
$15 + $24 = $39
The landscaping service costs $39
$10 x 3 = $30
Mary's neighbour costs $30
She should choose her neighbour because she is cheaper.
Hope I helped!