Because of a recent increase in the number of neck injuries incurred by high school food players, the Department of commerce designed a study to evaluate the strength of football helmets worn by high school players in the United States. A total of 540 helmets were collected from the five companies currently produce helmets. What variables should be measured?

6 spoons of sugar for every 21 cups of flour

step-by-step explanation:

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

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step-by-step explanation: