Which expression would be easier to simplify if you used the commutative property to change the order of the numbers?
–15+ (-25) + 43
1/7+(-1)+2/7
120+80+(-65)
40+10+(-12)

i believe it is the 2rd one if I am roung I am very sorry

1) c 2143.6 cm

2) c 113.0 m

3) a 33.5 ft

4)   d 2 cm

5) c 20 mm

6) 180 in

7) d 120 ft

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.