Three electrical appliances each have power ratings of 178 watts, and 2 other appliances each have power ratings of 434 watts. what is the total power used by these appliances? 5 5/8 watts6 5/8 watts10 1/4 watts15 1/8 watts

Here is the solution of the given problem above:
Given: appliance A, B and C: 1 7/8 watts x 3 = 45/8 watts
           appliance D : 4 3/4 watts
           appliance E : 4 3/4 watts
           ?: total power used by these appliances
In order to know the total, we just have to add the number of watts. 
So we add 45/8 watts plus 38/4 watts. The common denominator for these two fractions is 32. Therefore, the final answer would be 15 4/32 or 15 1/8 watts. The correct answer would be the last option. Hope this answer helps.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.