A veterinarian weighs 140 Lb. when she steps on a scale while holding a dog, the scale shows 192Lb. Let d represent the weight of the dog.

140+d = 192

d = 52

Step-by-step explanation:

the weight of the vet plus the god = total weight

140+d = 192

d = 192 - 140

d = 52

192=140+d          d=52

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

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not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this