-7.1+-5.8=-12.9
hope this helps :)
Answer:
u put the algebraic like terms together whether they add or subtract each other
-11 ,-3, -6, 0, 7, 9 I hope im right
192 in2
The formula for surface area is 2(lw + wh + hl) = 2(2*8 + 12*8 + 12*2) = 2(16+56+24) = 2(96) = 192
