Answer:
n + d = 20....n = 20 - d
0.05n + 0.10d = 1.35
0.05(20 - d) + 0.10n = 1.35
1 - 0.05d + 0.10d = 1.35
-0.05d + 0.10d = 1.35 - 1
0.05d = 0.35
d = 0.35/0.05
d = 7 <==== 7 dimes
n + d = 20
n + 7 = 20
n = 20 - 7
n = 13 <=== 13 nickels
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well i cannot see the box... but I can tell you how to solve the exercise.
imagine the box has height H, width W and Length L
the volume of said box would be V = H*W*L
now imagine that Carla's box was similar to this one.
and she filled this box with 1 cm cubes, assuming the height to be 3 cm
v= (number of cubes height) *(number of cubes width) *(number of cubes length) = 3 * 3 * 5 cubic cm= 45 cubic cm
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 33 3
Just find the surface area. 5*7=35, but 35*2=7<span>0</span>, because the top and bottom. Then do 7*3*2=42, for 2 parallel sides, and then 3*5*2=30. Now add 70+30+42=142 square inches. There's your answer.
23.25 hours because if you can divide 279 hours (michael) divided by 12, you would get 23 hours and 25minutes