The simplification of 7+7×7-7÷7
55
13
56
97

First we do multiplication
So
7+ 49_7/7

Then we do division
So,
7+49_1

Then we do adding
So,
56_1

Then subtraction
So
The answer is: 55

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.

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answer:
congruent segments
step-by-step explanation:
congruent segments. take a line, cut it in half, superipose one half over the other half; you'll have congruence.