Question 17 of 55 Each box of envelopes contains 12 envelopes. Mr. Jensen
buys an unknown number of boxes.
Which expression shows the total number of envelopes Mr. Jensen buys?
Use x for the number of boxes.
A X+12
B. x-12
OC
O D. 12x

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.

The answe maybbe